diff --git a/examples/component-prerequisites/resources/configmap_test.go b/examples/component-prerequisites/resources/configmap_test.go
index 84c99744..755d2c60 100644
--- a/examples/component-prerequisites/resources/configmap_test.go
+++ b/examples/component-prerequisites/resources/configmap_test.go
@@ -34,6 +34,8 @@ func TestConfigMapShape(t *testing.T) {
 	res, err := resources.NewConfigMapResource(owner)
 	require.NoError(t, err)
 
-	golden.AssertYAML(t, "testdata/configmap.yaml", res.(golden.Previewer),
+	previewer, ok := res.(golden.Previewer)
+	require.True(t, ok, "resource does not implement golden.Previewer")
+	golden.AssertYAML(t, "testdata/configmap.yaml", previewer,
 		golden.WithScheme(scheme), golden.Update(*update))
 }
diff --git a/examples/component-prerequisites/resources/deployment_test.go b/examples/component-prerequisites/resources/deployment_test.go
index 396ddea5..09ab1b57 100644
--- a/examples/component-prerequisites/resources/deployment_test.go
+++ b/examples/component-prerequisites/resources/deployment_test.go
@@ -62,7 +62,9 @@ func TestDeploymentShape(t *testing.T) {
 			res, err := resources.NewDeploymentResource(owner)
 			require.NoError(t, err)
 
-			golden.AssertYAML(t, tt.golden, res.(golden.Previewer),
+			previewer, ok := res.(golden.Previewer)
+			require.True(t, ok, "resource does not implement golden.Previewer")
+			golden.AssertYAML(t, tt.golden, previewer,
 				golden.WithScheme(scheme), golden.Update(*update))
 		})
 	}
diff --git a/examples/custom-resource/resources/certificate_test.go b/examples/custom-resource/resources/certificate_test.go
index fed35b59..7bee9272 100644
--- a/examples/custom-resource/resources/certificate_test.go
+++ b/examples/custom-resource/resources/certificate_test.go
@@ -49,7 +49,9 @@ func TestCertificateShape(t *testing.T) {
 	res, err := resources.NewCertificateResource(testOwner())
 	require.NoError(t, err)
 
-	golden.AssertYAML(t, "testdata/certificate.yaml", res.(golden.Previewer), golden.Update(*update))
+	previewer, ok := res.(golden.Previewer)
+	require.True(t, ok, "resource does not implement golden.Previewer")
+	golden.AssertYAML(t, "testdata/certificate.yaml", previewer, golden.Update(*update))
 }
 
 // TestCertificateBaseShape pins the bare base object before any mutations.
diff --git a/examples/extraction-and-guards/resources/configmap_test.go b/examples/extraction-and-guards/resources/configmap_test.go
index fa59f3e4..0f6d1310 100644
--- a/examples/extraction-and-guards/resources/configmap_test.go
+++ b/examples/extraction-and-guards/resources/configmap_test.go
@@ -36,6 +36,8 @@ func TestConfigMapShape(t *testing.T) {
 	res, err := resources.NewConfigMapResource(owner, &dbHost)
 	require.NoError(t, err)
 
-	golden.AssertYAML(t, "testdata/configmap.yaml", res.(golden.Previewer),
+	previewer, ok := res.(golden.Previewer)
+	require.True(t, ok, "resource does not implement golden.Previewer")
+	golden.AssertYAML(t, "testdata/configmap.yaml", previewer,
 		golden.WithScheme(scheme), golden.Update(*update))
 }
diff --git a/examples/extraction-and-guards/resources/secret_test.go b/examples/extraction-and-guards/resources/secret_test.go
index 6fc151a8..0a7fa60a 100644
--- a/examples/extraction-and-guards/resources/secret_test.go
+++ b/examples/extraction-and-guards/resources/secret_test.go
@@ -23,6 +23,8 @@ func TestSecretShape(t *testing.T) {
 	res, err := resources.NewSecretResource(owner, &dbHost)
 	require.NoError(t, err)
 
-	golden.AssertYAML(t, "testdata/secret.yaml", res.(golden.Previewer),
+	previewer, ok := res.(golden.Previewer)
+	require.True(t, ok, "resource does not implement golden.Previewer")
+	golden.AssertYAML(t, "testdata/secret.yaml", previewer,
 		golden.WithScheme(scheme), golden.Update(*update))
 }
diff --git a/examples/grace-inconsistency/resources/deployment_test.go b/examples/grace-inconsistency/resources/deployment_test.go
index 9e279a08..b7be792d 100644
--- a/examples/grace-inconsistency/resources/deployment_test.go
+++ b/examples/grace-inconsistency/resources/deployment_test.go
@@ -38,6 +38,8 @@ func TestDeploymentShape(t *testing.T) {
 	res, err := resources.NewDeploymentResource(owner)
 	require.NoError(t, err)
 
-	golden.AssertYAML(t, "testdata/deployment.yaml", res.(golden.Previewer),
+	previewer, ok := res.(golden.Previewer)
+	require.True(t, ok, "resource does not implement golden.Previewer")
+	golden.AssertYAML(t, "testdata/deployment.yaml", previewer,
 		golden.WithScheme(testScheme()), golden.Update(*update))
 }