diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
new file mode 100644
index 0000000..18ff30b
--- /dev/null
+++ b/.github/workflows/test.yml
@@ -0,0 +1,32 @@
+name: Test
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+jobs:
+  go:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        go-version: [1.18.x, 1.19.x]
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-go@v3
+        with:
+          go-version: ${{ matrix.go-version }}
+          cache: true
+      - run: make test
+  golangci:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-go@v3
+        with:
+          go-version: 1.x
+          cache: true
+      - uses: golangci/golangci-lint-action@v3
+        with:
+          version: latest
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..6aa8b3a
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+*.makefile
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index b888a14..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,9 +0,0 @@
-language: go
-go:
-  - 1.12.x
-  - 1.13.x
-env:
-  - GO111MODULE=on
-cache:
-  directories:
-    - $GOPATH/pkg/mod
diff --git a/Makefile b/Makefile
index 7e42be8..bdffdab 100644
--- a/Makefile
+++ b/Makefile
@@ -1,10 +1,6 @@
-default: vet test
+default: test
 
-test:
-	go test -a ./...
+.minimal.makefile:
+	curl -fsSL -o $@ https://gitlab.com/bsm/misc/raw/master/make/go/minimal.makefile
 
-bench:
-	go test ./... -bench=. -run=NONE
-
-vet:
-	go vet ./...
+include .minimal.makefile
diff --git a/audio_test.go b/audio_test.go
index 85e9dfd..1c7c9a8 100644
--- a/audio_test.go
+++ b/audio_test.go
@@ -1,57 +1,62 @@
-package openrtb
+package openrtb_test
 
 import (
-	. "github.com/onsi/ginkgo"
-	. "github.com/onsi/gomega"
+	"errors"
+	"reflect"
+	"testing"
+
+	. "github.com/bsm/openrtb/v3"
 )
 
-var _ = Describe("Audio", func() {
+func TestAudio(t *testing.T) {
 	var subject *Audio
+	if err := fixture("audio", &subject); err != nil {
+		t.Fatalf("expected no error, got %v", err)
+	}
 
-	BeforeEach(func() {
-		Expect(fixture("audio", &subject)).To(Succeed())
-	})
-
-	It("should parse correctly", func() {
-		Expect(subject).To(Equal(&Audio{
-			MIMEs: []string{
-				"audio/mp4",
-			},
-			MinDuration:  5,
-			MaxDuration:  30,
-			Protocols:    []Protocol{ProtocolDAAST1, ProtocolDAAST1Wrapper},
-			Sequence:     1,
-			BlockedAttrs: []CreativeAttribute{CreativeAttributeUserInitiated, CreativeAttributeWindowsDialogOrAlert},
-			MaxExtended:  30,
-			MinBitrate:   300,
-			MaxBitrate:   1500,
-			Delivery:     []ContentDelivery{ContentDeliveryProgressive},
-			CompanionAds: []Banner{
-				{Width: 300, Height: 250, ID: "1234567893-1", Position: AdPositionAboveFold, BlockedAttrs: []CreativeAttribute{CreativeAttributeUserInitiated, CreativeAttributeWindowsDialogOrAlert}, ExpDirs: []ExpDir{ExpDirRight, ExpDirDown}},
-				{Width: 728, Height: 90, ID: "1234567893-2", Position: AdPositionAboveFold, BlockedAttrs: []CreativeAttribute{CreativeAttributeUserInitiated, CreativeAttributeWindowsDialogOrAlert}},
-			},
-			APIs:           []APIFramework{APIFrameworkVPAID1, APIFrameworkVPAID2},
-			CompanionTypes: []CompanionType{CompanionTypeStatic, CompanionTypeHTML},
-		}))
-	})
-
-	It("should validate", func() {
-		Expect((&Audio{
-			MinDuration:  5,
-			MaxDuration:  30,
-			Protocols:    []Protocol{ProtocolDAAST1, ProtocolDAAST1Wrapper},
-			Sequence:     1,
-			BlockedAttrs: []CreativeAttribute{CreativeAttributeUserInitiated, CreativeAttributeWindowsDialogOrAlert},
-			MaxExtended:  30,
-			MinBitrate:   300,
-			MaxBitrate:   1500,
-			Delivery:     []ContentDelivery{ContentDeliveryProgressive},
-			CompanionAds: []Banner{
-				{Width: 300, Height: 250, ID: "1234567893-1", Position: AdPositionAboveFold, BlockedAttrs: []CreativeAttribute{CreativeAttributeUserInitiated, CreativeAttributeWindowsDialogOrAlert}, ExpDirs: []ExpDir{ExpDirRight, ExpDirDown}},
-				{Width: 728, Height: 90, ID: "1234567893-2", Position: AdPositionAboveFold, BlockedAttrs: []CreativeAttribute{CreativeAttributeUserInitiated, CreativeAttributeWindowsDialogOrAlert}},
-			},
-			CompanionTypes: []CompanionType{CompanionTypeStatic, CompanionTypeHTML},
-		}).Validate()).To(Equal(ErrInvalidAudioNoMIMEs))
-	})
+	exp := &Audio{
+		MIMEs: []string{
+			"audio/mp4",
+		},
+		MinDuration:  5,
+		MaxDuration:  30,
+		Protocols:    []Protocol{ProtocolDAAST1, ProtocolDAAST1Wrapper},
+		Sequence:     1,
+		BlockedAttrs: []CreativeAttribute{CreativeAttributeUserInitiated, CreativeAttributeWindowsDialogOrAlert},
+		MaxExtended:  30,
+		MinBitrate:   300,
+		MaxBitrate:   1500,
+		Delivery:     []ContentDelivery{ContentDeliveryProgressive},
+		CompanionAds: []Banner{
+			{Width: 300, Height: 250, ID: "1234567893-1", Position: AdPositionAboveFold, BlockedAttrs: []CreativeAttribute{CreativeAttributeUserInitiated, CreativeAttributeWindowsDialogOrAlert}, ExpDirs: []ExpDir{ExpDirRight, ExpDirDown}},
+			{Width: 728, Height: 90, ID: "1234567893-2", Position: AdPositionAboveFold, BlockedAttrs: []CreativeAttribute{CreativeAttributeUserInitiated, CreativeAttributeWindowsDialogOrAlert}},
+		},
+		APIs:           []APIFramework{APIFrameworkVPAID1, APIFrameworkVPAID2},
+		CompanionTypes: []CompanionType{CompanionTypeStatic, CompanionTypeHTML},
+	}
+	if got := subject; !reflect.DeepEqual(exp, got) {
+		t.Errorf("expected %+v, got %+v", exp, got)
+	}
+}
 
-})
+func TestAudio_Validate(t *testing.T) {
+	subject := &Audio{
+		MinDuration:  5,
+		MaxDuration:  30,
+		Protocols:    []Protocol{ProtocolDAAST1, ProtocolDAAST1Wrapper},
+		Sequence:     1,
+		BlockedAttrs: []CreativeAttribute{CreativeAttributeUserInitiated, CreativeAttributeWindowsDialogOrAlert},
+		MaxExtended:  30,
+		MinBitrate:   300,
+		MaxBitrate:   1500,
+		Delivery:     []ContentDelivery{ContentDeliveryProgressive},
+		CompanionAds: []Banner{
+			{Width: 300, Height: 250, ID: "1234567893-1", Position: AdPositionAboveFold, BlockedAttrs: []CreativeAttribute{CreativeAttributeUserInitiated, CreativeAttributeWindowsDialogOrAlert}, ExpDirs: []ExpDir{ExpDirRight, ExpDirDown}},
+			{Width: 728, Height: 90, ID: "1234567893-2", Position: AdPositionAboveFold, BlockedAttrs: []CreativeAttribute{CreativeAttributeUserInitiated, CreativeAttributeWindowsDialogOrAlert}},
+		},
+		CompanionTypes: []CompanionType{CompanionTypeStatic, CompanionTypeHTML},
+	}
+	if exp, got := ErrInvalidAudioNoMIMEs, subject.Validate(); !errors.Is(exp, got) {
+		t.Fatalf("expected %v, got %v", exp, got)
+	}
+}
diff --git a/banner_test.go b/banner_test.go
index 26e3f0d..669d80f 100644
--- a/banner_test.go
+++ b/banner_test.go
@@ -1,27 +1,28 @@
-package openrtb
+package openrtb_test
 
 import (
-	. "github.com/onsi/ginkgo"
-	. "github.com/onsi/gomega"
+	"reflect"
+	"testing"
+
+	. "github.com/bsm/openrtb/v3"
 )
 
-var _ = Describe("Banner", func() {
+func TestBanner(t *testing.T) {
 	var subject *Banner
+	if err := fixture("banner", &subject); err != nil {
+		t.Fatalf("expected no error, got %v", err)
+	}
 
-	BeforeEach(func() {
-		Expect(fixture("banner", &subject)).To(Succeed())
-	})
-
-	It("should parse correctly", func() {
-		Expect(subject).To(Equal(&Banner{
-			Width:        728,
-			Height:       90,
-			Position:     AdPositionAboveFold,
-			BlockedTypes: []BannerType{BannerTypeFrame},
-			BlockedAttrs: []CreativeAttribute{CreativeAttributeWindowsDialogOrAlert},
-			APIs:         []APIFramework{APIFrameworkMRAID1},
-			VCM:          1,
-		}))
-	})
-
-})
+	exp := &Banner{
+		Width:        728,
+		Height:       90,
+		Position:     AdPositionAboveFold,
+		BlockedTypes: []BannerType{BannerTypeFrame},
+		BlockedAttrs: []CreativeAttribute{CreativeAttributeWindowsDialogOrAlert},
+		APIs:         []APIFramework{APIFrameworkMRAID1},
+		VCM:          1,
+	}
+	if got := subject; !reflect.DeepEqual(exp, got) {
+		t.Errorf("expected %+v, got %+v", exp, got)
+	}
+}
diff --git a/bench_test.go b/bench_test.go
index c90b2dd..4f20fb2 100644
--- a/bench_test.go
+++ b/bench_test.go
@@ -2,13 +2,13 @@ package openrtb
 
 import (
 	"encoding/json"
-	"io/ioutil"
+	"os"
 	"path/filepath"
 	"testing"
 )
 
 func BenchmarkBidRequest_Unmarshal(b *testing.B) {
-	data, err := ioutil.ReadFile(filepath.Join("testdata", "breq.video.json"))
+	data, err := os.ReadFile(filepath.Join("testdata", "breq.video.json"))
 	if err != nil {
 		b.Fatal(err.Error())
 	}
@@ -23,7 +23,7 @@ func BenchmarkBidRequest_Unmarshal(b *testing.B) {
 }
 
 func BenchmarkBidRequest_Marshal(b *testing.B) {
-	data, err := ioutil.ReadFile(filepath.Join("testdata", "breq.video.json"))
+	data, err := os.ReadFile(filepath.Join("testdata", "breq.video.json"))
 	if err != nil {
 		b.Fatal(err.Error())
 	}
diff --git a/bid_test.go b/bid_test.go
index 44899b3..9b1d0f9 100644
--- a/bid_test.go
+++ b/bid_test.go
@@ -1,38 +1,45 @@
-package openrtb
+package openrtb_test
 
 import (
-	. "github.com/onsi/ginkgo"
-	. "github.com/onsi/gomega"
+	"errors"
+	"reflect"
+	"testing"
+
+	. "github.com/bsm/openrtb/v3"
 )
 
-var _ = Describe("Bid", func() {
+func TestBid(t *testing.T) {
 	var subject *Bid
+	if err := fixture("bid", &subject); err != nil {
+		t.Fatalf("expected no error, got %v", err)
+	}
 
-	BeforeEach(func() {
-		Expect(fixture("bid", &subject)).To(Succeed())
-	})
-
-	It("should parse correctly", func() {
-		Expect(subject).To(Equal(&Bid{
-			ID:         "1",
-			ImpID:      "1",
-			Price:      0.751371,
-			AdID:       "52a5516d29e435137c6f6e74",
-			NoticeURL:  "http://ads.com/win/112770_1386565997?won=${AUCTION_PRICE}",
-			AdMarkup:   "<html/>",
-			AdvDomains: []string{"ads.com"},
-			ImageURL:   "http://ads.com/112770_1386565997.jpeg",
-			CampaignID: "52a5516d29e435137c6f6e74",
-			CreativeID: "52a5516d29e435137c6f6e74_1386565997",
-			DealID:     "example_deal",
-			Attrs:      []CreativeAttribute{},
-		}))
-	})
-
-	It("should validate", func() {
-		Expect((&Bid{}).Validate()).To(Equal(ErrInvalidBidNoID))
-		Expect((&Bid{ID: "BIDID"}).Validate()).To(Equal(ErrInvalidBidNoImpID))
-		Expect(subject.Validate()).NotTo(HaveOccurred())
-	})
+	exp := &Bid{
+		ID:         "1",
+		ImpID:      "1",
+		Price:      0.751371,
+		AdID:       "52a5516d29e435137c6f6e74",
+		NoticeURL:  "http://ads.com/win/112770_1386565997?won=${AUCTION_PRICE}",
+		AdMarkup:   "<html/>",
+		AdvDomains: []string{"ads.com"},
+		ImageURL:   "http://ads.com/112770_1386565997.jpeg",
+		CampaignID: "52a5516d29e435137c6f6e74",
+		CreativeID: "52a5516d29e435137c6f6e74_1386565997",
+		DealID:     "example_deal",
+		Attrs:      []CreativeAttribute{},
+	}
+	if got := subject; !reflect.DeepEqual(exp, got) {
+		t.Errorf("expected %+v, got %+v", exp, got)
+	}
+}
 
-})
+func TestBid_Validate(t *testing.T) {
+	subject := &Bid{}
+	if exp, got := ErrInvalidBidNoID, subject.Validate(); !errors.Is(exp, got) {
+		t.Fatalf("expected %v, got %v", exp, got)
+	}
+	subject = &Bid{ID: "BIDID"}
+	if exp, got := ErrInvalidBidNoImpID, subject.Validate(); !errors.Is(exp, got) {
+		t.Fatalf("expected %v, got %v", exp, got)
+	}
+}
diff --git a/bidrequest_test.go b/bidrequest_test.go
index 88131c3..33ff7a4 100644
--- a/bidrequest_test.go
+++ b/bidrequest_test.go
@@ -1,79 +1,88 @@
-package openrtb
+package openrtb_test
 
 import (
-	. "github.com/onsi/ginkgo"
-	. "github.com/onsi/gomega"
+	"errors"
+	"reflect"
+	"testing"
+
+	. "github.com/bsm/openrtb/v3"
 )
 
-var _ = Describe("BidRequest", func() {
+func TestBidRequest(t *testing.T) {
 	var subject *BidRequest
-	privacyPolicy := 1
-
-	BeforeEach(func() {
-		Expect(fixture("breq.banner", &subject)).To(Succeed())
-	})
+	if err := fixture("breq.banner", &subject); err != nil {
+		t.Fatalf("expected no error, got %v", err)
+	}
 
-	It("should parse complex requests", func() {
-		for _, kind := range []string{"exp", "video", "native"} {
-			var req *BidRequest
-			err := fixture("breq."+kind, &req)
-			Expect(err).NotTo(HaveOccurred(), "for %s", kind)
-			Expect(req.Validate()).NotTo(HaveOccurred(), "for %s", kind)
-		}
-	})
-
-	It("should parse correctly", func() {
-		Expect(subject).To(Equal(&BidRequest{
-			ID: "1234534625254",
-			Impressions: []Impression{
-				{
-					ID:     "1",
-					Secure: 1,
-					Banner: &Banner{Width: 300, Height: 250, Position: AdPositionAboveFold, BlockedAttrs: []CreativeAttribute{CreativeAttributeUserInitiated}},
-				},
+	privacyPolicy := 1
+	exp := &BidRequest{
+		ID: "1234534625254",
+		Impressions: []Impression{
+			{
+				ID:     "1",
+				Secure: 1,
+				Banner: &Banner{Width: 300, Height: 250, Position: AdPositionAboveFold, BlockedAttrs: []CreativeAttribute{CreativeAttributeUserInitiated}},
 			},
-			Site: &Site{
-				Inventory: Inventory{
-					ID:            "234563",
-					Name:          "Site ABCD",
-					Domain:        "siteabcd.com",
-					Categories:    []ContentCategory{ContentCategoryAutoParts, ContentCategoryAutoRepair},
-					Publisher:     &Publisher{ID: "pub12345", Name: "Publisher A"},
-					PrivacyPolicy: &privacyPolicy,
-					Content: &Content{
-						Keywords: "keyword a,keyword b,keyword c",
-					},
+		},
+		Site: &Site{
+			Inventory: Inventory{
+				ID:            "234563",
+				Name:          "Site ABCD",
+				Domain:        "siteabcd.com",
+				Categories:    []ContentCategory{ContentCategoryAutoParts, ContentCategoryAutoRepair},
+				Publisher:     &Publisher{ID: "pub12345", Name: "Publisher A"},
+				PrivacyPolicy: &privacyPolicy,
+				Content: &Content{
+					Keywords: "keyword a,keyword b,keyword c",
 				},
-				Page:     "http://siteabcd.com/page.htm",
-				Referrer: "http://referringsite.com/referringpage.htm",
-			},
-			Device: &Device{
-				UA:           "Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.16) Gecko/20110319 Firefox/3.6.16",
-				IP:           "64.124.253.1",
-				OS:           "OS X",
-				JS:           1,
-				FlashVersion: "10.1",
-			},
-			User: &User{
-				ID:       "45asdf987656789adfad4678rew656789",
-				BuyerUID: "5df678asd8987656asdf78987654",
 			},
-			Test:              1,
-			AuctionType:       2,
-			TimeMax:           120,
-			BlockedAdvDomains: []string{"company1.com", "company2.com"},
-		}))
-	})
+			Page:     "http://siteabcd.com/page.htm",
+			Referrer: "http://referringsite.com/referringpage.htm",
+		},
+		Device: &Device{
+			UA:           "Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.16) Gecko/20110319 Firefox/3.6.16",
+			IP:           "64.124.253.1",
+			OS:           "OS X",
+			JS:           1,
+			FlashVersion: "10.1",
+		},
+		User: &User{
+			ID:       "45asdf987656789adfad4678rew656789",
+			BuyerUID: "5df678asd8987656asdf78987654",
+		},
+		Test:              1,
+		AuctionType:       2,
+		TimeMax:           120,
+		BlockedAdvDomains: []string{"company1.com", "company2.com"},
+	}
+	if got := subject; !reflect.DeepEqual(exp, got) {
+		t.Errorf("expected %+v, got %+v", exp, got)
+	}
+}
 
-	It("should validate", func() {
-		Expect((&BidRequest{}).Validate()).To(Equal(ErrInvalidReqNoID))
-		Expect((&BidRequest{ID: "A"}).Validate()).To(Equal(ErrInvalidReqNoImps))
-		Expect((&BidRequest{ID: "A", Impressions: []Impression{{ID: "1"}}, Site: &Site{}, App: &App{}}).Validate()).To(Equal(ErrInvalidReqMultiInv))
-
-		Expect((&BidRequest{ID: "A", Impressions: []Impression{{ID: "1", Banner: &Banner{}}}}).Validate()).NotTo(HaveOccurred())
-		Expect((&BidRequest{ID: "A", Impressions: []Impression{{ID: "1", Banner: &Banner{}}}, Site: &Site{}}).Validate()).NotTo(HaveOccurred())
-		Expect((&BidRequest{ID: "A", Impressions: []Impression{{ID: "1", Banner: &Banner{}}}, App: &App{}}).Validate()).NotTo(HaveOccurred())
-		Expect(subject.Validate()).NotTo(HaveOccurred())
-	})
+func TestBidRequest_complex(t *testing.T) {
+	for _, kind := range []string{"exp", "video", "native"} {
+		var subject *BidRequest
+		if err := fixture("breq."+kind, &subject); err != nil {
+			t.Fatalf("expected no error, got %v", err)
+		}
+		if err := subject.Validate(); err != nil {
+			t.Fatalf("expected no error, got %v", err)
+		}
+	}
+}
 
-})
+func TestBidRequest_Validate(t *testing.T) {
+	subject := &BidRequest{}
+	if exp, got := ErrInvalidReqNoID, subject.Validate(); !errors.Is(exp, got) {
+		t.Fatalf("expected %v, got %v", exp, got)
+	}
+	subject = &BidRequest{ID: "RID"}
+	if exp, got := ErrInvalidReqNoImps, subject.Validate(); !errors.Is(exp, got) {
+		t.Fatalf("expected %v, got %v", exp, got)
+	}
+	subject = &BidRequest{ID: "A", Impressions: []Impression{{ID: "1"}}, Site: &Site{}, App: &App{}}
+	if exp, got := ErrInvalidReqMultiInv, subject.Validate(); !errors.Is(exp, got) {
+		t.Fatalf("expected %v, got %v", exp, got)
+	}
+}
diff --git a/bidresponse_test.go b/bidresponse_test.go
index 3b94222..39fb075 100644
--- a/bidresponse_test.go
+++ b/bidresponse_test.go
@@ -1,54 +1,66 @@
-package openrtb
+package openrtb_test
 
 import (
-	. "github.com/onsi/ginkgo"
-	. "github.com/onsi/gomega"
+	"errors"
+	"reflect"
+	"testing"
+
+	. "github.com/bsm/openrtb/v3"
 )
 
-var _ = Describe("BidResponse", func() {
+func TestBidResponse(t *testing.T) {
 	var subject *BidResponse
+	if err := fixture("bres.single", &subject); err != nil {
+		t.Fatalf("expected no error, got %v", err)
+	}
 
-	BeforeEach(func() {
-		Expect(fixture("bres.single", &subject)).To(Succeed())
-	})
-
-	It("should parse complex responses", func() {
-		for _, kind := range []string{"multi", "pmp", "vast"} {
-			var req *BidResponse
-			Expect(fixture("bres."+kind, &req)).To(Succeed(), "for %s", kind)
-			Expect(req.Validate()).NotTo(HaveOccurred(), "for %s", kind)
-		}
-	})
-
-	It("should parse responses", func() {
-		Expect(subject).To(Equal(&BidResponse{
-			ID: "BID-4-ZIMP-4b309eae-504a-4252-a8a8-4c8ceee9791a",
-			SeatBids: []SeatBid{
-				{
-					Bids: []Bid{
-						{
-							ID:         "32a69c6ba388f110487f9d1e63f77b22d86e916b",
-							ImpID:      "32a69c6ba388f110487f9d1e63f77b22d86e916b",
-							Price:      0.065445,
-							AdID:       "529833ce55314b19e8796116",
-							NoticeURL:  "http://ads.com/win/529833ce55314b19e8796116?won=${auction_price}",
-							AdMarkup:   "<iframe src=\"foo.bar\"/>",
-							AdvDomains: []string{},
-							CampaignID: "529833ce55314b19e8796116",
-							CreativeID: "529833ce55314b19e8796116_1385706446",
-							Attrs:      []CreativeAttribute{},
-						},
+	exp := &BidResponse{
+		ID: "BID-4-ZIMP-4b309eae-504a-4252-a8a8-4c8ceee9791a",
+		SeatBids: []SeatBid{
+			{
+				Bids: []Bid{
+					{
+						ID:         "32a69c6ba388f110487f9d1e63f77b22d86e916b",
+						ImpID:      "32a69c6ba388f110487f9d1e63f77b22d86e916b",
+						Price:      0.065445,
+						AdID:       "529833ce55314b19e8796116",
+						NoticeURL:  "http://ads.com/win/529833ce55314b19e8796116?won=${auction_price}",
+						AdMarkup:   "<iframe src=\"foo.bar\"/>",
+						AdvDomains: []string{},
+						CampaignID: "529833ce55314b19e8796116",
+						CreativeID: "529833ce55314b19e8796116_1385706446",
+						Attrs:      []CreativeAttribute{},
 					},
-					Seat: "772",
 				},
+				Seat: "772",
 			},
-			Currency: "USD",
-		}))
-	})
+		},
+		Currency: "USD",
+	}
+	if got := subject; !reflect.DeepEqual(exp, got) {
+		t.Errorf("expected %+v, got %+v", exp, got)
+	}
+}
+
+func TestBidResponse_complex(t *testing.T) {
+	for _, kind := range []string{"multi", "pmp", "vast"} {
+		var subject *BidResponse
+		if err := fixture("bres."+kind, &subject); err != nil {
+			t.Fatalf("expected no error, got %v", err)
+		}
+		if err := subject.Validate(); err != nil {
+			t.Fatalf("expected no error, got %v", err)
+		}
+	}
+}
 
-	It("should validate", func() {
-		Expect((&BidResponse{}).Validate()).To(Equal(ErrInvalidRespNoID))
-		Expect((&BidResponse{ID: "RESPID"}).Validate()).To(Equal(ErrInvalidRespNoSeatBids))
-		Expect(subject.Validate()).NotTo(HaveOccurred())
-	})
-})
+func TestBidResponse_Validate(t *testing.T) {
+	subject := &BidResponse{}
+	if exp, got := ErrInvalidRespNoID, subject.Validate(); !errors.Is(exp, got) {
+		t.Fatalf("expected %v, got %v", exp, got)
+	}
+	subject = &BidResponse{ID: "RID"}
+	if exp, got := ErrInvalidRespNoSeatBids, subject.Validate(); !errors.Is(exp, got) {
+		t.Fatalf("expected %v, got %v", exp, got)
+	}
+}
diff --git a/content_test.go b/content_test.go
index dadd4d8..2e414fd 100644
--- a/content_test.go
+++ b/content_test.go
@@ -1,53 +1,55 @@
-package openrtb
+package openrtb_test
 
 import (
-	. "github.com/onsi/ginkgo"
-	. "github.com/onsi/gomega"
+	"reflect"
+	"testing"
+
+	. "github.com/bsm/openrtb/v3"
 )
 
-var _ = Describe("Content", func() {
+func TestContent(t *testing.T) {
 	var subject *Content
+	if err := fixture("content", &subject); err != nil {
+		t.Fatalf("expected no error, got %v", err)
+	}
 
-	BeforeEach(func() {
-		Expect(fixture("content", &subject)).To(Succeed())
-	})
-
-	It("should parse correctly", func() {
-		Expect(subject).To(Equal(&Content{
-			ID:    "1",
-			Title: "Video",
-			Producer: &Producer{
-				ID:     "agltb3B1Yi1pbmNyDAsSA0FwcBiJkfTUCV",
-				Name:   "yahoo",
-				Domain: "www.yahoo.com",
-			},
-		}))
-	})
-})
+	exp := &Content{
+		ID:    "1",
+		Title: "Video",
+		Producer: &Producer{
+			ID:     "agltb3B1Yi1pbmNyDAsSA0FwcBiJkfTUCV",
+			Name:   "yahoo",
+			Domain: "www.yahoo.com",
+		},
+	}
+	if got := subject; !reflect.DeepEqual(exp, got) {
+		t.Errorf("expected %+v, got %+v", exp, got)
+	}
+}
 
-var _ = Describe("QuotedContent", func() {
+func TestContent_quoted(t *testing.T) {
 	var subject *Content
+	if err := fixture("content.quoted", &subject); err != nil {
+		t.Fatalf("expected no error, got %v", err)
+	}
 
-	BeforeEach(func() {
-		Expect(fixture("content.quoted", &subject)).To(Succeed())
-	})
-
-	It("should parse correctly", func() {
-		Expect(subject).To(Equal(&Content{
-			Keywords:           "Orwell, 1984",
-			UserRating:         "3",
-			Episode:            1,
-			Title:              "This is the video title",
-			URL:                "http://cdnp.tremormedia.com/video/1984.flv",
-			LiveStream:         0,
-			ContentRating:      "G",
-			Length:             129,
-			Series:             "book reading",
-			VideoQuality:       2,
-			Context:            1,
-			Season:             "1",
-			SourceRelationship: 0,
-			ID:                 "eb9f13ede5fd225333971523f6042f9d",
-		}))
-	})
-})
+	exp := &Content{
+		Keywords:           "Orwell, 1984",
+		UserRating:         "3",
+		Episode:            1,
+		Title:              "This is the video title",
+		URL:                "http://cdnp.tremormedia.com/video/1984.flv",
+		LiveStream:         0,
+		ContentRating:      "G",
+		Length:             129,
+		Series:             "book reading",
+		VideoQuality:       2,
+		Context:            1,
+		Season:             "1",
+		SourceRelationship: 0,
+		ID:                 "eb9f13ede5fd225333971523f6042f9d",
+	}
+	if got := subject; !reflect.DeepEqual(exp, got) {
+		t.Errorf("expected %+v, got %+v", exp, got)
+	}
+}
diff --git a/device_test.go b/device_test.go
index 37d50b8..988043d 100644
--- a/device_test.go
+++ b/device_test.go
@@ -1,43 +1,45 @@
-package openrtb
+package openrtb_test
 
 import (
-	. "github.com/onsi/ginkgo"
-	. "github.com/onsi/gomega"
+	"reflect"
+	"testing"
+
+	. "github.com/bsm/openrtb/v3"
 )
 
-var _ = Describe("Device", func() {
+func TestDevice(t *testing.T) {
 	var subject *Device
+	if err := fixture("device", &subject); err != nil {
+		t.Fatalf("expected no error, got %v", err)
+	}
 
-	BeforeEach(func() {
-		Expect(fixture("device", &subject)).To(Succeed())
-	})
-
-	It("should parse correctly", func() {
-		Expect(subject).To(Equal(&Device{
-			DNT: 0,
-			UA:  "Mozilla/5.0 (iPhone; CPU iPhone OS 6_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9A334 Safari/7534.48.3",
-			IP:  "123.145.167.189",
-			Geo: &Geo{
-				Latitude:  35.012345,
-				Longitude: -115.12345,
-				Country:   "USA",
-				Region:    "CA",
-				Metro:     "803",
-				City:      "Los Angeles",
-				ZIP:       "90049",
-			},
-			PIDSHA1:    "AA000DFE74168477C70D291f574D344790E0BB11",
-			PIDMD5:     "AA003EABFB29E6F759F3BDAB34E50BB11",
-			Carrier:    "310-410",
-			Language:   "en",
-			Make:       "Apple",
-			Model:      "iPhone",
-			OS:         "iOS",
-			OSVersion:  "6.1",
-			JS:         1,
-			ConnType:   ConnTypeCell,
-			MCCMNC:     "722-341",
-			DeviceType: DeviceTypeMobile,
-		}))
-	})
-})
+	exp := &Device{
+		DNT: 0,
+		UA:  "Mozilla/5.0 (iPhone; CPU iPhone OS 6_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9A334 Safari/7534.48.3",
+		IP:  "123.145.167.189",
+		Geo: &Geo{
+			Latitude:  35.012345,
+			Longitude: -115.12345,
+			Country:   "USA",
+			Region:    "CA",
+			Metro:     "803",
+			City:      "Los Angeles",
+			ZIP:       "90049",
+		},
+		PIDSHA1:    "AA000DFE74168477C70D291f574D344790E0BB11",
+		PIDMD5:     "AA003EABFB29E6F759F3BDAB34E50BB11",
+		Carrier:    "310-410",
+		Language:   "en",
+		Make:       "Apple",
+		Model:      "iPhone",
+		OS:         "iOS",
+		OSVersion:  "6.1",
+		JS:         1,
+		ConnType:   ConnTypeCell,
+		MCCMNC:     "722-341",
+		DeviceType: DeviceTypeMobile,
+	}
+	if got := subject; !reflect.DeepEqual(exp, got) {
+		t.Errorf("expected %+v, got %+v", exp, got)
+	}
+}
diff --git a/go.mod b/go.mod
index f433fa1..5d8e195 100644
--- a/go.mod
+++ b/go.mod
@@ -1,8 +1,3 @@
 module github.com/bsm/openrtb/v3
 
 go 1.13
-
-require (
-	github.com/onsi/ginkgo v1.10.2
-	github.com/onsi/gomega v1.7.0
-)
diff --git a/go.sum b/go.sum
index 47ebf2d..e69de29 100644
--- a/go.sum
+++ b/go.sum
@@ -1,27 +0,0 @@
-github.com/fsnotify/fsnotify v1.4.7 h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV9I=
-github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
-github.com/golang/protobuf v1.2.0 h1:P3YflyNX/ehuJFLhxviNdFxQPkGK5cDcApsge1SqnvM=
-github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
-github.com/hpcloud/tail v1.0.0 h1:nfCOvKYfkgYP8hkirhJocXT2+zOD8yUNjXaWfTlyFKI=
-github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpOxQnU=
-github.com/onsi/ginkgo v1.6.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
-github.com/onsi/ginkgo v1.10.2 h1:uqH7bpe+ERSiDa34FDOF7RikN6RzXgduUF8yarlZp94=
-github.com/onsi/ginkgo v1.10.2/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
-github.com/onsi/gomega v1.7.0 h1:XPnZz8VVBHjVsy1vzJmRwIcSwiUO+JFfrv/xGiigmME=
-github.com/onsi/gomega v1.7.0/go.mod h1:ex+gbHU/CVuBBDIJjb2X0qEXbFg53c61hWP/1CpauHY=
-golang.org/x/net v0.0.0-20180906233101-161cd47e91fd h1:nTDtHvHSdCn1m6ITfMRqtOd/9+7a3s8RBNOZ3eYZzJA=
-golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
-golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f h1:wMNYb4v58l5UBM7MYRLPG6ZhfOqbKu7X5eyFl8ZhKvA=
-golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e h1:o3PsSEY8E4eXWkXrIP9YJALUkVZqzHJT5DOasTyn8Vs=
-golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
-golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/fsnotify.v1 v1.4.7 h1:xOHLXZwVvI9hhs+cLKq5+I5onOuwQLhQwiu63xxlHs4=
-gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
-gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 h1:uRGJdciOHaEIrze2W8Q3AKkepLTh2hOroT7a+7czfdQ=
-gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
-gopkg.in/yaml.v2 v2.2.1 h1:mUhvW9EsL+naU5Q3cakzfE91YhliOondGd6ZrsDBHQE=
-gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
diff --git a/impression_test.go b/impression_test.go
index 114703e..958816d 100644
--- a/impression_test.go
+++ b/impression_test.go
@@ -1,42 +1,49 @@
-package openrtb
+package openrtb_test
 
 import (
-	. "github.com/onsi/ginkgo"
-	. "github.com/onsi/gomega"
+	"errors"
+	"reflect"
+	"testing"
+
+	. "github.com/bsm/openrtb/v3"
 )
 
-var _ = Describe("Impression", func() {
+func TestImpression(t *testing.T) {
 	var subject *Impression
+	if err := fixture("impression", &subject); err != nil {
+		t.Fatalf("expected no error, got %v", err)
+	}
 
-	BeforeEach(func() {
-		Expect(fixture("impression", &subject)).To(Succeed())
-	})
-
-	It("should parse correctly", func() {
-		Expect(subject).To(Equal(&Impression{
-			ID: "1",
-			Banner: &Banner{
-				Width:  300,
-				Height: 250,
-			},
-			BidFloor: 0.03,
-			PMP: &PMP{
-				Private: 1,
-				Deals: []Deal{
-					{
-						ID:          "DX-1985-010A",
-						BidFloor:    2.5,
-						AuctionType: 2,
-					},
+	exp := &Impression{
+		ID: "1",
+		Banner: &Banner{
+			Width:  300,
+			Height: 250,
+		},
+		BidFloor: 0.03,
+		PMP: &PMP{
+			Private: 1,
+			Deals: []Deal{
+				{
+					ID:          "DX-1985-010A",
+					BidFloor:    2.5,
+					AuctionType: 2,
 				},
 			},
-		}))
-	})
-
-	It("should validate", func() {
-		Expect((&Impression{}).Validate()).To(Equal(ErrInvalidImpNoID))
-		Expect((&Impression{ID: "IMPID", Banner: &Banner{}, Video: &Video{}}).Validate()).To(Equal(ErrInvalidImpMultiAssets))
-		Expect((&Impression{ID: "IMPID", Banner: &Banner{}}).Validate()).NotTo(HaveOccurred())
-	})
+		},
+	}
+	if got := subject; !reflect.DeepEqual(exp, got) {
+		t.Errorf("expected %+v, got %+v", exp, got)
+	}
+}
 
-})
+func TestImpression_Validate(t *testing.T) {
+	subject := &Impression{}
+	if exp, got := ErrInvalidImpNoID, subject.Validate(); !errors.Is(exp, got) {
+		t.Fatalf("expected %v, got %v", exp, got)
+	}
+	subject = &Impression{ID: "IMPID", Banner: &Banner{}, Video: &Video{}}
+	if exp, got := ErrInvalidImpMultiAssets, subject.Validate(); !errors.Is(exp, got) {
+		t.Fatalf("expected %v, got %v", exp, got)
+	}
+}
diff --git a/inventory_test.go b/inventory_test.go
index ec3d867..c5a011f 100644
--- a/inventory_test.go
+++ b/inventory_test.go
@@ -1,64 +1,58 @@
-package openrtb
+package openrtb_test
 
 import (
-	. "github.com/onsi/ginkgo"
-	. "github.com/onsi/gomega"
+	"reflect"
+	"testing"
+
+	. "github.com/bsm/openrtb/v3"
 )
 
-var _ = Describe("App", func() {
+func TestApp(t *testing.T) {
 	var subject *App
-
-	BeforeEach(func() {
-		Expect(fixture("app", &subject)).To(Succeed())
-	})
-
-	It("should have accessors", func() {
-		Expect(subject.GetPrivacyPolicy()).To(Equal(1))
-	})
-
-	It("should parse correctly", func() {
-		Expect(subject).To(Equal(&App{
-			Inventory: Inventory{
-				ID:         "agltb3B1Yi1pbmNyDAsSA0FwcBiJkfIUDA",
-				Name:       "Yahoo Weather",
-				Categories: []ContentCategory{"weather", ContentCategoryScience, ContentCategoryWeather},
-				Publisher: &Publisher{
-					ID:     "agltb3B1Yi1pbmNyDAsSA0FwcBiJkfTUCV",
-					Name:   "yahoo",
-					Domain: "www.yahoo.com",
-				},
+	if err := fixture("app", &subject); err != nil {
+		t.Fatalf("expected no error, got %v", err)
+	}
+
+	exp := &App{
+		Inventory: Inventory{
+			ID:         "agltb3B1Yi1pbmNyDAsSA0FwcBiJkfIUDA",
+			Name:       "Yahoo Weather",
+			Categories: []ContentCategory{"weather", ContentCategoryScience, ContentCategoryWeather},
+			Publisher: &Publisher{
+				ID:     "agltb3B1Yi1pbmNyDAsSA0FwcBiJkfTUCV",
+				Name:   "yahoo",
+				Domain: "www.yahoo.com",
 			},
-			Bundle:   "628677149",
-			Version:  "1.0.2",
-			StoreURL: "https://itunes.apple.com/id628677149",
-		}))
-	})
-})
-
-var _ = Describe("Site", func() {
+		},
+		Bundle:   "628677149",
+		Version:  "1.0.2",
+		StoreURL: "https://itunes.apple.com/id628677149",
+	}
+	if got := subject; !reflect.DeepEqual(exp, got) {
+		t.Errorf("expected %+v, got %+v", exp, got)
+	}
+}
+
+func TestSite(t *testing.T) {
 	var subject *Site
-
-	BeforeEach(func() {
-		Expect(fixture("site", &subject)).To(Succeed())
-	})
-
-	It("should have accessors", func() {
-		Expect(subject.GetPrivacyPolicy()).To(Equal(1))
-	})
-
-	It("should parse correctly", func() {
-		Expect(subject).To(Equal(&Site{
-			Inventory: Inventory{
-				ID:         "102855",
-				Categories: []ContentCategory{ContentCategoryAdvertising},
-				Domain:     "http://www.usabarfinder.com",
-				Publisher: &Publisher{
-					ID:     "8953",
-					Name:   "local.com",
-					Domain: "local.com",
-				},
+	if err := fixture("site", &subject); err != nil {
+		t.Fatalf("expected no error, got %v", err)
+	}
+
+	exp := &Site{
+		Inventory: Inventory{
+			ID:         "102855",
+			Categories: []ContentCategory{ContentCategoryAdvertising},
+			Domain:     "http://www.usabarfinder.com",
+			Publisher: &Publisher{
+				ID:     "8953",
+				Name:   "local.com",
+				Domain: "local.com",
 			},
-			Page: "http://eas.usabarfinder.com/eas?cu=13824;cre=mu;target=_blank",
-		}))
-	})
-})
+		},
+		Page: "http://eas.usabarfinder.com/eas?cu=13824;cre=mu;target=_blank",
+	}
+	if got := subject; !reflect.DeepEqual(exp, got) {
+		t.Errorf("expected %+v, got %+v", exp, got)
+	}
+}
diff --git a/native/request/request_test.go b/native/request/request_test.go
index 9c6091b..a96b847 100644
--- a/native/request/request_test.go
+++ b/native/request/request_test.go
@@ -1,45 +1,45 @@
-package request
+package request_test
 
 import (
 	"encoding/json"
-	"io/ioutil"
+	"os"
+	"reflect"
 	"testing"
 
 	"github.com/bsm/openrtb/v3"
-	. "github.com/onsi/ginkgo"
-	. "github.com/onsi/gomega"
+	. "github.com/bsm/openrtb/v3/native/request"
 )
 
-var _ = Describe("Request", func() {
-	It("should parse correctly", func() {
-		req := fixture("testdata/request1.json")
-		Expect(req).To(Equal(&Request{
-			Version:          "1.1",
-			ContextTypeID:    ContextTypeSocial,
-			ContextSubTypeID: ContextSubTypeSocial,
-			PlacementTypeID:  PlacementTypeID(11),
-			PlacementCount:   1,
-			Sequence:         2,
-			Assets: []Asset{
-				{ID: 123, Required: 1, Title: &Title{Length: 140}},
-				{ID: 128, Image: &Image{TypeID: ImageTypeMain, WidthMin: 836, HeightMin: 627, Width: 1000, Height: 800, MIMEs: []string{"image/jpg"}}},
-				{ID: 126, Required: 1, Data: &Data{TypeID: DataTypeSponsored, Length: 25}},
-				{ID: 127, Required: 1, Data: &Data{TypeID: DataTypeDesc, Length: 140}},
-				{ID: 4, Video: &Video{MinDuration: 15, MaxDuration: 30, Protocols: []openrtb.Protocol{openrtb.ProtocolVAST2, openrtb.ProtocolVAST3}, MIMEs: []string{"video/mp4"}}},
-			},
-		}))
-	})
-})
+func TestRequest(t *testing.T) {
+	var subject *Request
+	if err := fixture("testdata/request1.json", &subject); err != nil {
+		t.Fatalf("expected no error, got %v", err)
+	}
 
-func TestSuite(t *testing.T) {
-	RegisterFailHandler(Fail)
-	RunSpecs(t, "openrtb/native/request")
+	exp := &Request{
+		Version:          "1.1",
+		ContextTypeID:    ContextTypeSocial,
+		ContextSubTypeID: ContextSubTypeSocial,
+		PlacementTypeID:  PlacementTypeID(11),
+		PlacementCount:   1,
+		Sequence:         2,
+		Assets: []Asset{
+			{ID: 123, Required: 1, Title: &Title{Length: 140}},
+			{ID: 128, Image: &Image{TypeID: ImageTypeMain, WidthMin: 836, HeightMin: 627, Width: 1000, Height: 800, MIMEs: []string{"image/jpg"}}},
+			{ID: 126, Required: 1, Data: &Data{TypeID: DataTypeSponsored, Length: 25}},
+			{ID: 127, Required: 1, Data: &Data{TypeID: DataTypeDesc, Length: 140}},
+			{ID: 4, Video: &Video{MinDuration: 15, MaxDuration: 30, Protocols: []openrtb.Protocol{openrtb.ProtocolVAST2, openrtb.ProtocolVAST3}, MIMEs: []string{"video/mp4"}}},
+		},
+	}
+	if got := subject; !reflect.DeepEqual(exp, got) {
+		t.Errorf("expected %+v, got %+v", exp, got)
+	}
 }
 
-func fixture(path string) *Request {
-	var subject Request
-	enc, err := ioutil.ReadFile(path)
-	Expect(err).ToNot(HaveOccurred())
-	Expect(json.Unmarshal(enc, &subject)).To(Succeed())
-	return &subject
+func fixture(path string, v interface{}) error {
+	bin, err := os.ReadFile(path)
+	if err != nil {
+		return err
+	}
+	return json.Unmarshal(bin, v)
 }
diff --git a/native/response/response_test.go b/native/response/response_test.go
index bbfa9f8..c257bc0 100644
--- a/native/response/response_test.go
+++ b/native/response/response_test.go
@@ -1,44 +1,46 @@
-package response
+package response_test
 
 import (
 	"encoding/json"
-	"io/ioutil"
+	"os"
+	"reflect"
 	"testing"
 
-	. "github.com/onsi/ginkgo"
-	. "github.com/onsi/gomega"
+	. "github.com/bsm/openrtb/v3/native/response"
 )
 
-var _ = Describe("Response", func() {
-	It("should parse correctly", func() {
-		Expect(fixture("testdata/response1.json")).To(Equal(&Response{
-			Version:     "1.1",
-			ImpTrackers: []string{"http://imptracker.com"},
-			JSTracker:   "<script>track()</script>",
-			Link: Link{
-				URL: "http://i.am.a/URL",
-			},
-			Assets: []Asset{
-				{ID: 123, Required: 1, Title: &Title{Text: "Learn about this awesome thing"}},
-				{ID: 124, Required: 1, Image: &Image{URL: "http://www.myads.com/thumbnail1.png"}},
-				{ID: 128, Required: 1, Image: &Image{URL: "http://www.myads.com/largethumb1.png"}},
-				{ID: 126, Required: 1, Data: &Data{Value: "My Brand"}},
-				{ID: 127, Required: 1, Data: &Data{Value: "Learn all about this awesome story of someone using my product."}},
-				{ID: 4, Video: &Video{VASTTag: "<VAST version=\"2.0\"></VAST>"}},
-				{ID: 5, Link: &Link{URL: "http://landing.com", ClickTrackers: []string{"http://tracker.com"}, FallbackURL: "http://fallback.com"}},
-			},
-		}))
-	})
-})
+func TestResponse(t *testing.T) {
+	var subject *Response
+	if err := fixture("testdata/response1.json", &subject); err != nil {
+		t.Fatalf("expected no error, got %v", err)
+	}
 
-func TestSuite(t *testing.T) {
-	RegisterFailHandler(Fail)
-	RunSpecs(t, "openrtb/native/response")
+	exp := &Response{
+		Version:     "1.1",
+		ImpTrackers: []string{"http://imptracker.com"},
+		JSTracker:   "<script>track()</script>",
+		Link: Link{
+			URL: "http://i.am.a/URL",
+		},
+		Assets: []Asset{
+			{ID: 123, Required: 1, Title: &Title{Text: "Learn about this awesome thing"}},
+			{ID: 124, Required: 1, Image: &Image{URL: "http://www.myads.com/thumbnail1.png"}},
+			{ID: 128, Required: 1, Image: &Image{URL: "http://www.myads.com/largethumb1.png"}},
+			{ID: 126, Required: 1, Data: &Data{Value: "My Brand"}},
+			{ID: 127, Required: 1, Data: &Data{Value: "Learn all about this awesome story of someone using my product."}},
+			{ID: 4, Video: &Video{VASTTag: "<VAST version=\"2.0\"></VAST>"}},
+			{ID: 5, Link: &Link{URL: "http://landing.com", ClickTrackers: []string{"http://tracker.com"}, FallbackURL: "http://fallback.com"}},
+		},
+	}
+	if got := subject; !reflect.DeepEqual(exp, got) {
+		t.Errorf("expected %+v, got %+v", exp, got)
+	}
 }
 
-func fixture(path string) (res *Response) {
-	enc, err := ioutil.ReadFile(path)
-	Expect(err).ToNot(HaveOccurred())
-	Expect(json.Unmarshal(enc, &res)).To(Succeed())
-	return res
+func fixture(path string, v interface{}) error {
+	bin, err := os.ReadFile(path)
+	if err != nil {
+		return err
+	}
+	return json.Unmarshal(bin, v)
 }
diff --git a/native_test.go b/native_test.go
index a517ade..4ff6315 100644
--- a/native_test.go
+++ b/native_test.go
@@ -1,23 +1,24 @@
-package openrtb
+package openrtb_test
 
 import (
 	"encoding/json"
+	"reflect"
+	"testing"
 
-	. "github.com/onsi/ginkgo"
-	. "github.com/onsi/gomega"
+	. "github.com/bsm/openrtb/v3"
 )
 
-var _ = Describe("Native", func() {
+func TestNative(t *testing.T) {
 	var subject *Native
+	if err := fixture("native", &subject); err != nil {
+		t.Fatalf("expected no error, got %v", err)
+	}
 
-	BeforeEach(func() {
-		Expect(fixture("native", &subject)).To(Succeed())
-	})
-
-	It("should parse correctly", func() {
-		Expect(subject).To(Equal(&Native{
-			Request: json.RawMessage(`"PAYLOAD"`),
-			Version: "2",
-		}))
-	})
-})
+	exp := &Native{
+		Request: json.RawMessage(`"PAYLOAD"`),
+		Version: "2",
+	}
+	if got := subject; !reflect.DeepEqual(exp, got) {
+		t.Errorf("expected %+v, got %+v", exp, got)
+	}
+}
diff --git a/numbers_test.go b/numbers_test.go
index 7b237f5..a5d8549 100644
--- a/numbers_test.go
+++ b/numbers_test.go
@@ -1,63 +1,46 @@
-package openrtb
+package openrtb_test
 
 import (
 	"encoding/json"
+	"testing"
 
-	. "github.com/onsi/ginkgo"
-	. "github.com/onsi/gomega"
+	. "github.com/bsm/openrtb/v3"
 )
 
-var _ = Describe("NumberOrString", func() {
-	It("should decode numbers", func() {
-		var n NumberOrString
-		Expect(json.Unmarshal([]byte(`33`), &n)).To(Succeed())
-		Expect(n).To(Equal(NumberOrString(33)))
-	})
-
-	It("should decode strings", func() {
-		var n NumberOrString
-		Expect(json.Unmarshal([]byte(`"33"`), &n)).To(Succeed())
-		Expect(n).To(Equal(NumberOrString(33)))
-	})
-
-	It("should encode to numbers", func() {
-		var n NumberOrString = 33
-		bin, err := json.Marshal(n)
-		Expect(err).NotTo(HaveOccurred())
-		Expect(string(bin)).To(Equal(`33`))
-	})
-})
-
-var _ = Describe("StringOrNumber", func() {
-	It("should decode numbers", func() {
-		var n StringOrNumber
-		Expect(json.Unmarshal([]byte(`33`), &n)).To(Succeed())
-		Expect(n).To(Equal(StringOrNumber("33")))
-	})
-
-	It("should decode strings", func() {
-		var n StringOrNumber
-		Expect(json.Unmarshal([]byte(`"33"`), &n)).To(Succeed())
-		Expect(n).To(Equal(StringOrNumber("33")))
-	})
-
-	It("should decode strings", func() {
-		var n StringOrNumber
-		Expect(json.Unmarshal([]byte(`""`), &n)).To(Succeed())
-		Expect(n).To(Equal(StringOrNumber("")))
-	})
-
-	It("should encode to strings", func() {
-		var n StringOrNumber = "33"
-		bin, err := json.Marshal(n)
-		Expect(err).NotTo(HaveOccurred())
-		Expect(string(bin)).To(Equal(`"33"`))
-	})
-
-	It("should encode to strings", func() {
-		var n StringOrNumber = ""
-		bin, err := json.Marshal(n)
-		Expect(err).NotTo(HaveOccurred())
-		Expect(string(bin)).To(Equal(`""`))
-	})
-})
+func TestNumberOrString(t *testing.T) {
+	var v NumberOrString
+
+	if err := json.Unmarshal([]byte(`33`), &v); err != nil {
+		t.Errorf("expected no error, got %v", err)
+	} else if exp := NumberOrString(33); exp != v {
+		t.Errorf("expected %#v, got %#v", exp, v)
+	}
+
+	if err := json.Unmarshal([]byte(`"34"`), &v); err != nil {
+		t.Errorf("expected no error, got %v", err)
+	} else if exp := NumberOrString(34); exp != v {
+		t.Errorf("expected %#v, got %#v", exp, v)
+	}
+}
+
+func TestStringOrNumber(t *testing.T) {
+	var v StringOrNumber
+
+	if err := json.Unmarshal([]byte(`33`), &v); err != nil {
+		t.Errorf("expected no error, got %v", err)
+	} else if exp := StringOrNumber("33"); exp != v {
+		t.Errorf("expected %#v, got %#v", exp, v)
+	}
+
+	if err := json.Unmarshal([]byte(`"34"`), &v); err != nil {
+		t.Errorf("expected no error, got %v", err)
+	} else if exp := StringOrNumber("34"); exp != v {
+		t.Errorf("expected %#v, got %#v", exp, v)
+	}
+
+	if err := json.Unmarshal([]byte(`""`), &v); err != nil {
+		t.Errorf("expected no error, got %v", err)
+	} else if exp := StringOrNumber(""); exp != v {
+		t.Errorf("expected %#v, got %#v", exp, v)
+	}
+}
diff --git a/openrtb_test.go b/openrtb_test.go
index f07c35d..2ba595c 100644
--- a/openrtb_test.go
+++ b/openrtb_test.go
@@ -1,20 +1,11 @@
-package openrtb
+package openrtb_test
 
 import (
 	"encoding/json"
 	"os"
 	"path/filepath"
-	"testing"
-
-	. "github.com/onsi/ginkgo"
-	. "github.com/onsi/gomega"
 )
 
-func TestSuite(t *testing.T) {
-	RegisterFailHandler(Fail)
-	RunSpecs(t, "openrtb")
-}
-
 func fixture(fname string, v interface{}) error {
 	f, err := os.Open(filepath.Join("testdata", fname+".json"))
 	if err != nil {
diff --git a/pmp_test.go b/pmp_test.go
index 20a852c..876c2a7 100644
--- a/pmp_test.go
+++ b/pmp_test.go
@@ -1,31 +1,38 @@
-package openrtb
+package openrtb_test
 
 import (
+	"bytes"
 	"encoding/json"
+	"reflect"
+	"testing"
 
-	. "github.com/onsi/ginkgo"
-	. "github.com/onsi/gomega"
+	. "github.com/bsm/openrtb/v3"
 )
 
-var _ = Describe("PMP", func() {
+func TestPMP(t *testing.T) {
 	var subject *PMP
+	if err := fixture("pmp", &subject); err != nil {
+		t.Fatalf("expected no error, got %v", err)
+	}
 
-	BeforeEach(func() {
-		Expect(fixture("pmp", &subject)).To(Succeed())
-	})
+	exp := &PMP{
+		Private: 1,
+		Deals: []Deal{
+			{ID: "DX-1985-010A", BidFloor: 2.5, BidFloorCurrency: "", AuctionType: 2},
+			{ID: "DX-1986-010A", BidFloor: 2.6, BidFloorCurrency: "", AuctionType: 2},
+		},
+	}
+	if got := subject; !reflect.DeepEqual(exp, got) {
+		t.Errorf("expected %+v, got %+v", exp, got)
+	}
+}
 
-	It("should parse correctly", func() {
-		Expect(subject).To(Equal(&PMP{
-			Private: 1,
-			Deals: []Deal{
-				{ID: "DX-1985-010A", BidFloor: 2.5, BidFloorCurrency: "", AuctionType: 2},
-				{ID: "DX-1986-010A", BidFloor: 2.6, BidFloorCurrency: "", AuctionType: 2},
-			},
-		}))
-	})
-
-	It("should generate correctly", func() {
-		Expect(json.Marshal(&PMP{Deals: []Deal{{}}})).To(MatchJSON(`{"deals":[{"at":2}]}`))
-	})
-
-})
+func TestPMP_MarshalJSON(t *testing.T) {
+	subject := &PMP{Deals: []Deal{{}}}
+	exp := []byte(`{"deals":[{"at":2}]}`)
+	if got, err := json.Marshal(subject); err != nil {
+		t.Fatalf("expected no error, got %v", err)
+	} else if !bytes.Equal(exp, got) {
+		t.Errorf("expected %+v, got %+v", exp, got)
+	}
+}
diff --git a/seatbid_test.go b/seatbid_test.go
index 9cf7697..9f73349 100644
--- a/seatbid_test.go
+++ b/seatbid_test.go
@@ -1,15 +1,15 @@
-package openrtb
+package openrtb_test
 
 import (
-	. "github.com/onsi/ginkgo"
-	. "github.com/onsi/gomega"
+	"errors"
+	"testing"
+
+	. "github.com/bsm/openrtb/v3"
 )
 
-var _ = Describe("SeatBid", func() {
-	It("should validate", func() {
-		Expect((&SeatBid{}).Validate()).To(Equal(ErrInvalidSeatBidBid))
-		Expect((&SeatBid{Bids: []Bid{
-			{ID: "BIDID", ImpID: "IMPID"}},
-		}).Validate()).NotTo(HaveOccurred())
-	})
-})
+func TestSeatBid_Validate(t *testing.T) {
+	subject := &SeatBid{}
+	if exp, got := ErrInvalidSeatBidBid, subject.Validate(); !errors.Is(exp, got) {
+		t.Fatalf("expected %v, got %v", exp, got)
+	}
+}
diff --git a/source_test.go b/source_test.go
index 0af6437..82401ea 100644
--- a/source_test.go
+++ b/source_test.go
@@ -1,26 +1,26 @@
-package openrtb
+package openrtb_test
 
 import (
 	"encoding/json"
+	"reflect"
+	"testing"
 
-	. "github.com/onsi/ginkgo"
-	. "github.com/onsi/gomega"
+	. "github.com/bsm/openrtb/v3"
 )
 
-var _ = Describe("Source", func() {
+func TestSource(t *testing.T) {
 	var subject *Source
+	if err := fixture("source", &subject); err != nil {
+		t.Fatalf("expected no error, got %v", err)
+	}
 
-	BeforeEach(func() {
-		err := fixture("source", &subject)
-		Expect(err).NotTo(HaveOccurred())
-	})
-
-	It("should parse correctly", func() {
-		Expect(subject).To(Equal(&Source{
-			FinalSaleDecision: 1,
-			TransactionID:     "transaction-id",
-			PaymentChain:      "payment-chain",
-			Ext:               json.RawMessage("{}"),
-		}))
-	})
-})
+	exp := &Source{
+		FinalSaleDecision: 1,
+		TransactionID:     "transaction-id",
+		PaymentChain:      "payment-chain",
+		Ext:               json.RawMessage("{}"),
+	}
+	if got := subject; !reflect.DeepEqual(exp, got) {
+		t.Errorf("expected %+v, got %+v", exp, got)
+	}
+}
diff --git a/video_test.go b/video_test.go
index ffad210..4b9cbda 100644
--- a/video_test.go
+++ b/video_test.go
@@ -1,68 +1,71 @@
-package openrtb
+package openrtb_test
 
 import (
-	. "github.com/onsi/ginkgo"
-	. "github.com/onsi/gomega"
+	"errors"
+	"reflect"
+	"testing"
+
+	. "github.com/bsm/openrtb/v3"
 )
 
-var _ = Describe("Video", func() {
+func TestVideo(t *testing.T) {
 	var subject *Video
+	if err := fixture("video", &subject); err != nil {
+		t.Fatalf("expected no error, got %v", err)
+	}
 
-	BeforeEach(func() {
-		Expect(fixture("video", &subject)).To(Succeed())
-	})
-
-	It("should parse correctly", func() {
-		boxingAllowed := 1
-		Expect(subject).To(Equal(&Video{
-			MIMEs: []string{
-				"video/x-flv",
-				"video/mp4",
-				"application/x-shockwave-flash",
-				"application/javascript",
-			},
-			MinDuration:     5,
-			MaxDuration:     30,
-			Protocols:       []Protocol{ProtocolVAST2, ProtocolVAST3},
-			Width:           640,
-			Height:          480,
-			Linearity:       VideoLinearityLinear,
-			Sequence:        1,
-			BlockedAttrs:    []CreativeAttribute{CreativeAttributeUserInitiated, CreativeAttributeWindowsDialogOrAlert},
-			MaxExtended:     30,
-			MinBitrate:      300,
-			MaxBitrate:      1500,
-			BoxingAllowed:   &boxingAllowed,
-			PlaybackMethods: []VideoPlayback{VideoPlaybackPageLoadSoundOn, VideoPlaybackClickToPlay},
-			Delivery:        []ContentDelivery{ContentDeliveryProgressive},
-			Position:        AdPositionAboveFold,
-			CompanionAds: []Banner{
-				{Width: 300, Height: 250, ID: "1234567893-1", Position: AdPositionAboveFold, BlockedAttrs: []CreativeAttribute{CreativeAttributeUserInitiated, CreativeAttributeWindowsDialogOrAlert}, ExpDirs: []ExpDir{ExpDirRight, ExpDirDown}},
-				{Width: 728, Height: 90, ID: "1234567893-2", Position: AdPositionAboveFold, BlockedAttrs: []CreativeAttribute{CreativeAttributeUserInitiated, CreativeAttributeWindowsDialogOrAlert}},
-			},
-			Placement:      VideoPlacementInStream,
-			APIs:           []APIFramework{APIFrameworkVPAID1, APIFrameworkVPAID2},
-			CompanionTypes: []CompanionType{CompanionTypeStatic, CompanionTypeHTML},
-		}))
-	})
+	boxingAllowed := 1
+	exp := &Video{
+		MIMEs: []string{
+			"video/x-flv",
+			"video/mp4",
+			"application/x-shockwave-flash",
+			"application/javascript",
+		},
+		MinDuration:     5,
+		MaxDuration:     30,
+		Protocols:       []Protocol{ProtocolVAST2, ProtocolVAST3},
+		Width:           640,
+		Height:          480,
+		Linearity:       VideoLinearityLinear,
+		Sequence:        1,
+		BlockedAttrs:    []CreativeAttribute{CreativeAttributeUserInitiated, CreativeAttributeWindowsDialogOrAlert},
+		MaxExtended:     30,
+		MinBitrate:      300,
+		MaxBitrate:      1500,
+		BoxingAllowed:   &boxingAllowed,
+		PlaybackMethods: []VideoPlayback{VideoPlaybackPageLoadSoundOn, VideoPlaybackClickToPlay},
+		Delivery:        []ContentDelivery{ContentDeliveryProgressive},
+		Position:        AdPositionAboveFold,
+		CompanionAds: []Banner{
+			{Width: 300, Height: 250, ID: "1234567893-1", Position: AdPositionAboveFold, BlockedAttrs: []CreativeAttribute{CreativeAttributeUserInitiated, CreativeAttributeWindowsDialogOrAlert}, ExpDirs: []ExpDir{ExpDirRight, ExpDirDown}},
+			{Width: 728, Height: 90, ID: "1234567893-2", Position: AdPositionAboveFold, BlockedAttrs: []CreativeAttribute{CreativeAttributeUserInitiated, CreativeAttributeWindowsDialogOrAlert}},
+		},
+		Placement:      VideoPlacementInStream,
+		APIs:           []APIFramework{APIFrameworkVPAID1, APIFrameworkVPAID2},
+		CompanionTypes: []CompanionType{CompanionTypeStatic, CompanionTypeHTML},
+	}
+	if got := subject; !reflect.DeepEqual(exp, got) {
+		t.Errorf("expected %+v, got %+v", exp, got)
+	}
+}
 
-	It("should validate", func() {
-		Expect((&Video{}).Validate()).To(Equal(ErrInvalidVideoNoMIMEs))
-		Expect((&Video{
-			MIMEs: []string{"video/mp4"},
-		}).Validate()).To(Equal(ErrInvalidVideoNoLinearity))
-		Expect((&Video{
-			MinDuration: 1,
-			MaxDuration: 1,
-			Linearity:   VideoLinearityNonLinear,
-			MIMEs:       []string{"video/mp4"},
-		}).Validate()).To(Equal(ErrInvalidVideoNoProtocols))
-		Expect((&Video{
-			Protocol:    ProtocolVAST3,
-			MinDuration: 1,
-			MaxDuration: 1,
-			Linearity:   VideoLinearityNonLinear,
-			MIMEs:       []string{"video/mp4"},
-		}).Validate()).NotTo(HaveOccurred())
-	})
-})
+func TestVideo_Validate(t *testing.T) {
+	subject := &Video{}
+	if exp, got := ErrInvalidVideoNoMIMEs, subject.Validate(); !errors.Is(exp, got) {
+		t.Fatalf("expected %v, got %v", exp, got)
+	}
+	subject = &Video{MIMEs: []string{"video/mp4"}}
+	if exp, got := ErrInvalidVideoNoLinearity, subject.Validate(); !errors.Is(exp, got) {
+		t.Fatalf("expected %v, got %v", exp, got)
+	}
+	subject = &Video{
+		MinDuration: 1,
+		MaxDuration: 1,
+		Linearity:   VideoLinearityNonLinear,
+		MIMEs:       []string{"video/mp4"},
+	}
+	if exp, got := ErrInvalidVideoNoProtocols, subject.Validate(); !errors.Is(exp, got) {
+		t.Fatalf("expected %v, got %v", exp, got)
+	}
+}