diff --git a/paimon-core/src/test/java/org/apache/paimon/mergetree/SortBufferWriteBufferTestBase.java b/paimon-core/src/test/java/org/apache/paimon/mergetree/SortBufferWriteBufferTestBase.java
index 89b217b5a5aa..5a911c006d04 100644
--- a/paimon-core/src/test/java/org/apache/paimon/mergetree/SortBufferWriteBufferTestBase.java
+++ b/paimon-core/src/test/java/org/apache/paimon/mergetree/SortBufferWriteBufferTestBase.java
@@ -167,7 +167,7 @@ public static class WithPartialUpdateMergeFunctionTest extends SortBufferWriteBu
 
         @Override
         protected boolean addOnly() {
-            return false;
+            return true;
         }
 
         @Override
diff --git a/pom.xml b/pom.xml
index 0aaa9977af9d..da46794248a3 100644
--- a/pom.xml
+++ b/pom.xml
@@ -493,6 +493,10 @@ under the License.
                         <junit.jupiter.extensions.autodetection.enabled>true</junit.jupiter.extensions.autodetection.enabled>
                     </systemPropertyVariables>
                     <argLine>-Xms256m -Xmx2048m -Dmvn.forkNumber=${surefire.forkNumber} -XX:+UseG1GC</argLine>
+                    <!-- By removing all default exclusions the nested classes get executed too -->
+                    <excludes>
+                        <exclude/>
+                    </excludes>
                 </configuration>
                 <executions>
                     <!--execute all the unit tests-->