diff --git a/winegrower-extension/winegrower-testing/winegrower-testing-junit5/src/main/java/org/apache/winegrower/extension/testing/junit5/internal/MonoWinegrowerExtension.java b/winegrower-extension/winegrower-testing/winegrower-testing-junit5/src/main/java/org/apache/winegrower/extension/testing/junit5/internal/MonoWinegrowerExtension.java
index 07e949d..eb9de07 100644
--- a/winegrower-extension/winegrower-testing/winegrower-testing-junit5/src/main/java/org/apache/winegrower/extension/testing/junit5/internal/MonoWinegrowerExtension.java
+++ b/winegrower-extension/winegrower-testing/winegrower-testing-junit5/src/main/java/org/apache/winegrower/extension/testing/junit5/internal/MonoWinegrowerExtension.java
@@ -54,6 +54,7 @@
                         }
                     });
                     instance.ripener.start();
+                    INSTANCE.set(instance);
                 }
             }
         }