diff --git a/cli/src/test-utils/test-runner-examples/object-query-param.ts b/cli/src/test-utils/test-runner-examples/object-query-param.ts
new file mode 100644
index 000000000..cffa9cd1a
--- /dev/null
+++ b/cli/src/test-utils/test-runner-examples/object-query-param.ts
@@ -0,0 +1,48 @@
+import {
+  api,
+  body,
+  endpoint,
+  Integer,
+  queryParams,
+  request,
+  response,
+  String,
+  test
+} from "@airtasker/spot";
+
+@api({ name: "company-api" })
+class CompanyApi {}
+
+@endpoint({
+  method: "GET",
+  path: "/companies"
+})
+class GetCompanies {
+  @request
+  request(@queryParams
+  queryParam: {
+    profile?: { name: String };
+  }) {}
+
+  @response({ status: 200 })
+  successResponse(@body body: CompanyBody[]) {}
+
+  @test({
+    request: {
+      queryParams: {
+        profile: {
+          name: "testname"
+        }
+      }
+    },
+    response: {
+      status: 200
+    }
+  })
+  successResponseTest() {}
+}
+
+interface CompanyBody {
+  name: String;
+  employeeCount: Integer;
+}
diff --git a/cli/src/test-utils/test-runner.spec.ts b/cli/src/test-utils/test-runner.spec.ts
index 661c5edcd..a228ec48a 100644
--- a/cli/src/test-utils/test-runner.spec.ts
+++ b/cli/src/test-utils/test-runner.spec.ts
@@ -371,6 +371,31 @@ describe("test runner", () => {
     expect(scope.isDone()).toBe(true);
     expect(result).toBe(true);
   });
+
+  test("request serializes query string objects using the deepObject strategy", async () => {
+    const contract = parseAndCleanse(
+      "./cli/src/test-utils/test-runner-examples/object-query-param.ts"
+    );
+
+    const scope = nock(baseUrl)
+      .post("/state")
+      .query({ action: "initialize" })
+      .reply(200)
+      .get("/companies?profile%5Bname%5D=testname")
+      .reply(200, [
+        {
+          name: "testname",
+          employeeCount: 15
+        }
+      ])
+      .post("/state")
+      .query({ action: "teardown" })
+      .reply(200);
+
+    const result = await runTest(contract, stateUrl, baseUrl);
+    expect(scope.isDone()).toBe(true);
+    expect(result).toBe(true);
+  });
 });
 
 function parseAndCleanse(path: string): ContractDefinition {
diff --git a/cli/src/test-utils/test-runner.ts b/cli/src/test-utils/test-runner.ts
index 4d150a8b3..779a5ad5b 100644
--- a/cli/src/test-utils/test-runner.ts
+++ b/cli/src/test-utils/test-runner.ts
@@ -1,5 +1,6 @@
 import JsonSchemaValidator from "ajv";
 import axios, { AxiosRequestConfig, AxiosResponse } from "axios";
+import { stringify as qsStringify } from "qs";
 import {
   JsonSchemaType,
   jsonTypeSchema
@@ -190,6 +191,10 @@ function generateAxiosConfig(
       {}
     );
 
+    config.paramsSerializer = params => {
+      return qsStringify(params);
+    };
+
     if (test.request.body) {
       config.data = valueFromDataExpression(test.request.body);
     }
diff --git a/package.json b/package.json
index 9c36c3e41..e8c4475a8 100644
--- a/package.json
+++ b/package.json
@@ -12,6 +12,7 @@
     "@oclif/plugin-help": "^2",
     "@types/cors": "^2.8.4",
     "@types/express": "^4.16.0",
+    "@types/qs": "^6.5.3",
     "@types/ramda": "^0.26.6",
     "@types/randomstring": "^1.1.6",
     "ajv": "^6.10.0",
@@ -24,6 +25,7 @@
     "inquirer": "^6.2.0",
     "js-yaml": "^3.13.1",
     "lodash": "^4.17.11",
+    "qs": "^6.7.0",
     "ramda": "^0.26.1",
     "randomstring": "^1.1.5",
     "ts-morph": "^1.3.3",
diff --git a/yarn.lock b/yarn.lock
index 1a24bdd69..d789a8cc2 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -551,6 +551,11 @@
   resolved "https://registry.yarnpkg.com/@types/node/-/node-11.13.2.tgz#dc85dde46aa8740bb4aed54b8104250f8f849503"
   integrity sha512-HOtU5KqROKT7qX/itKHuTtt5fV0iXbheQvrgbLNXFJQBY/eh+VS5vmmTAVlo3qIGMsypm0G4N1t2AXjy1ZicaQ==
 
+"@types/qs@^6.5.3":
+  version "6.5.3"
+  resolved "https://registry.yarnpkg.com/@types/qs/-/qs-6.5.3.tgz#1c3b71b091eaeaf5924538006b7f70603ce63d38"
+  integrity sha512-Jugo5V/1bS0fRhy2z8+cUAHEyWOATaz4rbyLVvcFs7+dXp5HfwpEwzF1Q11bB10ApUqHf+yTauxI0UXQDwGrbA==
+
 "@types/ramda@^0.26.6":
   version "0.26.6"
   resolved "https://registry.yarnpkg.com/@types/ramda/-/ramda-0.26.6.tgz#1aaf5060da8ebb99529420b6eb997c50f74c218e"
@@ -3988,6 +3993,11 @@ qs@^6.5.1:
   resolved "https://registry.yarnpkg.com/qs/-/qs-6.6.0.tgz#a99c0f69a8d26bf7ef012f871cdabb0aee4424c2"
   integrity sha512-KIJqT9jQJDQx5h5uAVPimw6yVg2SekOKu959OCtktD3FjzbpvaPr8i4zzg07DOMz+igA4W/aNM7OV8H37pFYfA==
 
+qs@^6.7.0:
+  version "6.7.0"
+  resolved "https://registry.yarnpkg.com/qs/-/qs-6.7.0.tgz#41dc1a015e3d581f1621776be31afb2876a9b1bc"
+  integrity sha512-VCdBRNFTX1fyE7Nb6FYoURo/SPe62QCaAyzJvUjwRaIsc+NePBEniHlvxFmmX56+HZphIGtV0XeCirBtpDrTyQ==
+
 ramda@^0.26.1:
   version "0.26.1"
   resolved "https://registry.yarnpkg.com/ramda/-/ramda-0.26.1.tgz#8d41351eb8111c55353617fc3bbffad8e4d35d06"