diff --git a/README.md b/README.md
index 9a168a28..eb11ba87 100644
--- a/README.md
+++ b/README.md
@@ -57,6 +57,9 @@ For other languages, there are third-party generators available:
 
 |    Language    | Clients | Servers | Repository |
 |----------------|---------|---------|------------|
+| **Go**         |    ✓    |    ✓    | Official support
+| **Python**     |    ✓    |         | Official support [(partial)](https://github.com/twitchtv/twirp/issues/185)
+| **Python3**    |    ✓    |    ✓    | [github.com/verloop/twirpy](https://github.com/verloop/twirpy)
 | **Java**       |    ✓    |    ✓    | [github.com/fajran/protoc-gen-twirp_java_jaxrs](https://github.com/fajran/protoc-gen-twirp_java_jaxrs)
 | **Java**       |         |    ✓    | [https://github.com/devork/flit](https://github.com/devork/flit)
 | **JavaScript** |    ✓    |         | [github.com/thechriswalker/protoc-gen-twirp_js](https://github.com/thechriswalker/protoc-gen-twirp_js)
diff --git a/errors_test.go b/errors_test.go
index d59d45d8..72cf4964 100644
--- a/errors_test.go
+++ b/errors_test.go
@@ -44,7 +44,7 @@ func TestWithMetaRaces(t *testing.T) {
 }
 
 func TestErrorCause(t *testing.T) {
-	rootCause := fmt.Errorf("this is only a test")
+	rootCause := errors.New("this is only a test")
 	twerr := InternalErrorWith(rootCause)
 	cause := errors.Cause(twerr)
 	if cause != rootCause {
@@ -57,7 +57,7 @@ type errorResponeWriter struct {
 }
 
 func (errorResponeWriter) Write([]byte) (int, error) {
-	return 0, fmt.Errorf("this is only a test")
+	return 0, errors.New("this is only a test")
 }
 
 func TestWriteError(t *testing.T) {