diff --git a/internal/proxy/reverse_test.go b/internal/proxy/reverse_test.go
index acb4837..f8eb33a 100644
--- a/internal/proxy/reverse_test.go
+++ b/internal/proxy/reverse_test.go
@@ -133,7 +133,15 @@ func TestBuildUpstreamURLRoundTrip(t *testing.T) {
 
 func assertSameURL(t *testing.T, got, want *url.URL) {
 	t.Helper()
-	if got.Scheme != want.Scheme || got.Host != want.Host || got.Path != want.Path || got.RawQuery != want.RawQuery {
-		t.Fatalf("URL mismatch\ngot  %q\nwant %q", got.String(), want.String())
+	if got == nil || want == nil {
+		t.Fatalf("nil URL: got=%v want=%v", got, want)
 	}
+	// JoinPath vs url.Parse can differ in Path vs RawPath while String() is identical.
+	if got.String() == want.String() {
+		return
+	}
+	if got.Scheme == want.Scheme && got.Host == want.Host && got.RawQuery == want.RawQuery && got.EscapedPath() == want.EscapedPath() {
+		return
+	}
+	t.Fatalf("URL mismatch\ngot  %q\nwant %q", got.String(), want.String())
 }