diff --git a/plugin/pom.xml b/plugin/pom.xml
index 7cf2b0b2..fbb631e6 100644
--- a/plugin/pom.xml
+++ b/plugin/pom.xml
@@ -22,6 +22,11 @@
     <url>https://github.com/${gitHubRepo}</url>
   </scm>
 
+  <properties>
+    <!-- Only this module should be published to repo.jenkins-ci.org/releases -->
+    <maven.deploy.skip>false</maven.deploy.skip>
+  </properties>
+
   <dependencyManagement>
     <dependencies>
       <dependency>
diff --git a/pom.xml b/pom.xml
index d08c15b1..f07adda8 100644
--- a/pom.xml
+++ b/pom.xml
@@ -114,6 +114,15 @@
           </systemProperties>
         </configuration>
       </plugin>
+      <!-- Aggregator only. inherited=false so plugin/ still deploys the HPI. -->
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-deploy-plugin</artifactId>
+        <inherited>false</inherited>
+        <configuration>
+          <skip>true</skip>
+        </configuration>
+      </plugin>
     </plugins>
   </build>
 
diff --git a/ui-tests/pom.xml b/ui-tests/pom.xml
index 6cbabe65..0efbeec6 100644
--- a/ui-tests/pom.xml
+++ b/ui-tests/pom.xml
@@ -14,7 +14,7 @@
   <packaging>jar</packaging>
 
   <properties>
-    <!-- no need to be deployed during release, this is a test-only module -->
+    <!-- ATH module is not a released artifact; skip even with deployAllAtOnce -->
     <maven.deploy.skip>true</maven.deploy.skip>
   </properties>
 
@@ -108,6 +108,13 @@
           </environmentVariables>
         </configuration>
       </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-deploy-plugin</artifactId>
+        <configuration>
+          <skip>true</skip>
+        </configuration>
+      </plugin>
     </plugins>
   </build>