diff --git a/packages/flutter/lib/src/painting/text_style.dart b/packages/flutter/lib/src/painting/text_style.dart
index f85e10436d..ab01cc5e96 100644
--- a/packages/flutter/lib/src/painting/text_style.dart
+++ b/packages/flutter/lib/src/painting/text_style.dart
@@ -893,8 +893,10 @@ class TextStyle with Diagnosticable {
     assert(backgroundColor == null || background == null, _kColorBackgroundWarning);
     String? newDebugLabel;
     assert(() {
-      if (this.debugLabel != null) {
-        newDebugLabel = debugLabel ?? '(${this.debugLabel}).copyWith';
+      if (debugLabel != null) {
+        newDebugLabel = debugLabel;
+      } else if (this.debugLabel != null) {
+        newDebugLabel = '(${this.debugLabel}).copyWith';
       }
       return true;
     }());
diff --git a/packages/flutter/test/painting/text_style_test.dart b/packages/flutter/test/painting/text_style_test.dart
index ffad8a3d66..09c0bf2c4a 100644
--- a/packages/flutter/test/painting/text_style_test.dart
+++ b/packages/flutter/test/painting/text_style_test.dart
@@ -374,6 +374,7 @@ void main() {
     expect(unknown.debugLabel, null);
     expect(unknown.toString(), 'TextStyle(<all styles inherited>)');
     expect(unknown.copyWith().debugLabel, null);
+    expect(unknown.copyWith(debugLabel: '123').debugLabel, '123');
     expect(unknown.apply().debugLabel, null);
 
     expect(foo.debugLabel, 'foo');