diff --git a/cmd/version_test.go b/cmd/version_test.go
new file mode 100644
index 0000000..c30b6dd
--- /dev/null
+++ b/cmd/version_test.go
@@ -0,0 +1,25 @@
+package cmd
+
+import "testing"
+
+func Test_buildVersion(t *testing.T) {
+	t.Run("no commit", func(t *testing.T) {
+		Version = "0.0.0-next"
+		Commit = ""
+		v := buildVersion()
+		want := Version
+		if v != want {
+			t.Errorf("buildVersion() got = %v, want %v", v, want)
+		}
+	})
+
+	t.Run("commit", func(t *testing.T) {
+		Version = "0.0.0-next"
+		Commit = "123"
+		v := buildVersion()
+		want := Version + " (" + Commit + ")"
+		if v != want {
+			t.Errorf("buildVersion() got = %v, want %v", v, want)
+		}
+	})
+}
diff --git a/internal/template/funcs_test.go b/internal/template/funcs_test.go
new file mode 100644
index 0000000..d5469b2
--- /dev/null
+++ b/internal/template/funcs_test.go
@@ -0,0 +1,43 @@
+package template
+
+import "testing"
+
+func TestDockerRepo(t *testing.T) {
+	type args struct {
+		image string
+	}
+	tests := []struct {
+		name string
+		args args
+		want string
+	}{
+		{"postgres:alpine", args{"postgres:alpine"}, "postgres"},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := DockerRepo(tt.args.image); got != tt.want {
+				t.Errorf("DockerRepo() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func TestDockerTag(t *testing.T) {
+	type args struct {
+		image string
+	}
+	tests := []struct {
+		name string
+		args args
+		want string
+	}{
+		{"postgres:alpine", args{"postgres:alpine"}, "alpine"},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := DockerTag(tt.args.image); got != tt.want {
+				t.Errorf("DockerTag() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}