Fix 'fix all' test.

src/EditorFeatures/CSharpTest/Diagnostics/UseAutoProperty/UseAutoPropertyTests.cs

@@ -996,7 +996,7 @@ int Q
     int P { get; }
 
     int Q { get; }
-}");
+}", fixAllActionEquivalenceKey: FeaturesResources.Use_auto_property);
         }
     }
 }