diff --git a/conn_test.go b/conn_test.go
index be7c9983..b4d57f21 100644
--- a/conn_test.go
+++ b/conn_test.go
@@ -364,7 +364,7 @@ func TestWasm(t *testing.T) {
 	defer cancel()
 
 	cmd := exec.CommandContext(ctx, "go", "test", "-exec=wasmbrowsertest", ".", "-v")
-	cmd.Env = append(os.Environ(), "GOOS=js", "GOARCH=wasm", fmt.Sprintf("WS_ECHO_SERVER_URL=%v", s.URL))
+	cmd.Env = append(cleanEnv(os.Environ()), "GOOS=js", "GOARCH=wasm", fmt.Sprintf("WS_ECHO_SERVER_URL=%v", s.URL))
 
 	b, err := cmd.CombinedOutput()
 	if err != nil {
@@ -372,6 +372,18 @@ func TestWasm(t *testing.T) {
 	}
 }
 
+func cleanEnv(env []string) (out []string) {
+	for _, e := range env {
+		// Filter out GITHUB envs and anything with token in it,
+		// especially GITHUB_TOKEN in CI as it breaks TestWasm.
+		if strings.HasPrefix(e, "GITHUB") || strings.Contains(e, "TOKEN") {
+			continue
+		}
+		out = append(out, e)
+	}
+	return out
+}
+
 func assertCloseStatus(exp websocket.StatusCode, err error) error {
 	if websocket.CloseStatus(err) == -1 {
 		return fmt.Errorf("expected websocket.CloseError: %T %v", err, err)