diff --git a/impl/maven-core/src/main/java/org/apache/maven/plugin/DefaultExtensionRealmCache.java b/impl/maven-core/src/main/java/org/apache/maven/plugin/DefaultExtensionRealmCache.java
index b20211525854..ce3cb5135f3e 100644
--- a/impl/maven-core/src/main/java/org/apache/maven/plugin/DefaultExtensionRealmCache.java
+++ b/impl/maven-core/src/main/java/org/apache/maven/plugin/DefaultExtensionRealmCache.java
@@ -149,6 +149,6 @@ public void register(MavenProject project, Key key, CacheRecord record) {
 
     @Override
     public void dispose() {
-        flush();
+        cache.clear();
     }
 }
diff --git a/impl/maven-core/src/main/java/org/apache/maven/plugin/DefaultPluginRealmCache.java b/impl/maven-core/src/main/java/org/apache/maven/plugin/DefaultPluginRealmCache.java
index 681955f21db3..1e822a2ccb0c 100644
--- a/impl/maven-core/src/main/java/org/apache/maven/plugin/DefaultPluginRealmCache.java
+++ b/impl/maven-core/src/main/java/org/apache/maven/plugin/DefaultPluginRealmCache.java
@@ -215,6 +215,6 @@ public void register(MavenProject project, Key key, CacheRecord record) {
 
     @Override
     public void dispose() {
-        flush();
+        cache.clear();
     }
 }
diff --git a/impl/maven-core/src/main/java/org/apache/maven/project/DefaultProjectRealmCache.java b/impl/maven-core/src/main/java/org/apache/maven/project/DefaultProjectRealmCache.java
index 82a1a814c1b0..9111177c3489 100644
--- a/impl/maven-core/src/main/java/org/apache/maven/project/DefaultProjectRealmCache.java
+++ b/impl/maven-core/src/main/java/org/apache/maven/project/DefaultProjectRealmCache.java
@@ -125,6 +125,6 @@ public void register(MavenProject project, Key key, CacheRecord record) {
 
     @Override
     public void dispose() {
-        flush();
+        cache.clear();
     }
 }