diff --git a/.github/workflows/maven.yml b/.github/workflows/maven.yml
index 555df17614c6..fb4275028eba 100644
--- a/.github/workflows/maven.yml
+++ b/.github/workflows/maven.yml
@@ -32,7 +32,8 @@ concurrency:
 permissions: {}
 
 env:
-  MIMIR_VERSION: 0.11.2
+  # Keep in sync with mimir testing version in pom.xml
+  MIMIR_VERSION: 0.11.4
   MIMIR_BASEDIR: ~/.mimir
   MIMIR_LOCAL: ~/.mimir/local
   MAVEN_OPTS: -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=./target/java_heapdump.hprof
@@ -53,6 +54,15 @@ jobs:
         with:
           persist-credentials: false
 
+      - name: Verify Mimir version alignment
+        shell: bash
+        run: |
+          POM_VERSION=$(grep -A2 'eu.maveniverse.maven.mimir' pom.xml | grep '<version>' | sed 's/.*<version>\(.*\)<\/version>.*/\1/')
+          if [ "$POM_VERSION" != "${{ env.MIMIR_VERSION }}" ]; then
+            echo "::error::MIMIR_VERSION (${{ env.MIMIR_VERSION }}) does not match pom.xml ($POM_VERSION) — update MIMIR_VERSION in this workflow"
+            exit 1
+          fi
+
       - name: Prepare Mimir for Maven 3.x
         shell: bash
         run: |
diff --git a/pom.xml b/pom.xml
index 13ef71e0f8e5..208518b70e83 100644
--- a/pom.xml
+++ b/pom.xml
@@ -690,10 +690,11 @@ under the License.
         <artifactId>jmh-generator-annprocess</artifactId>
         <version>${jmhVersion}</version>
       </dependency>
+      <!-- Keep version in sync with MIMIR_VERSION in .github/workflows/maven.yml -->
       <dependency>
         <groupId>eu.maveniverse.maven.mimir</groupId>
         <artifactId>testing</artifactId>
-        <version>0.11.2</version>
+        <version>0.11.4</version>
       </dependency>
     </dependencies>
     <!--bootstrap-start-comment-->