diff --git a/pkg/validation/spec/external_docs_test.go b/pkg/validation/spec/external_docs_test.go
index 918452773..dc150f99c 100644
--- a/pkg/validation/spec/external_docs_test.go
+++ b/pkg/validation/spec/external_docs_test.go
@@ -20,10 +20,7 @@ import (
 
 func TestIntegrationExternalDocs(t *testing.T) {
 	var extDocs = ExternalDocumentation{Description: "the name", URL: "the url"}
-	const extDocsYAML = "description: the name\nurl: the url\n"
 	const extDocsJSON = `{"description":"the name","url":"the url"}`
 	assertSerializeJSON(t, extDocs, extDocsJSON)
-	assertSerializeYAML(t, extDocs, extDocsYAML)
 	assertParsesJSON(t, extDocsJSON, extDocs)
-	assertParsesYAML(t, extDocsYAML, extDocs)
 }
diff --git a/pkg/validation/spec/structs_test.go b/pkg/validation/spec/structs_test.go
index d4b87f4fa..fe626ebed 100644
--- a/pkg/validation/spec/structs_test.go
+++ b/pkg/validation/spec/structs_test.go
@@ -20,7 +20,6 @@ import (
 	"testing"
 
 	"github.com/stretchr/testify/assert"
-	"gopkg.in/yaml.v2"
 )
 
 func assertSerializeJSON(t testing.TB, actual interface{}, expected string) bool {
@@ -31,14 +30,6 @@ func assertSerializeJSON(t testing.TB, actual interface{}, expected string) bool
 	return assert.Equal(t, string(ser), expected)
 }
 
-func assertSerializeYAML(t testing.TB, actual interface{}, expected string) bool {
-	ser, err := yaml.Marshal(actual)
-	if err != nil {
-		return assert.Fail(t, "unable to marshal to yaml (%s): %#v", err, actual)
-	}
-	return assert.Equal(t, string(ser), expected)
-}
-
 func derefTypeOf(expected interface{}) (tpe reflect.Type) {
 	tpe = reflect.TypeOf(expected)
 	if tpe.Kind() == reflect.Ptr {
@@ -68,19 +59,6 @@ func assertParsesJSON(t testing.TB, actual string, expected interface{}) bool {
 	return assert.Equal(t, act, expected)
 }
 
-func assertParsesYAML(t testing.TB, actual string, expected interface{}) bool {
-	parsed := reflect.New(derefTypeOf(expected))
-	err := yaml.Unmarshal([]byte(actual), parsed.Interface())
-	if err != nil {
-		return assert.Fail(t, "unable to unmarshal from yaml (%s): %s", err, actual)
-	}
-	act := parsed.Interface()
-	if !isPointed(expected) {
-		act = reflect.Indirect(parsed).Interface()
-	}
-	return assert.EqualValues(t, act, expected)
-}
-
 func TestSerialization_SerializeJSON(t *testing.T) {
 	assertSerializeJSON(t, []string{"hello"}, "[\"hello\"]")
 	assertSerializeJSON(t, []string{"hello", "world", "and", "stuff"}, "[\"hello\",\"world\",\"and\",\"stuff\"]")