diff --git a/java/java-backend/resources/META-INF/RegistryKeys.xml b/java/java-backend/resources/META-INF/RegistryKeys.xml
index d4c592f4a285..4bf5295b2dd2 100644
--- a/java/java-backend/resources/META-INF/RegistryKeys.xml
+++ b/java/java-backend/resources/META-INF/RegistryKeys.xml
@@ -127,7 +127,7 @@
     <registryKey key="java.functional.expression.search.fail.fast.in.dumb.mode" defaultValue="true"
                  description="When true (default), JavaFunctionalExpressionSearcher throws IndexNotReadyException immediately in dumb mode instead of waiting for smart mode. When false, falls back to the legacy behavior of waiting for smart mode."/>
 
-    <registryKey key="java.resolve.prefer.test.sources" defaultValue="false"
+    <registryKey key="java.resolve.prefer.test.sources" defaultValue="true"
                  description="When resolving from test code, prefer a same-FQN class from the module's test source root over the production one (matches javac test-source shadowing)."/>
   </extensions>
 </idea-plugin>
\ No newline at end of file