diff --git a/.github/workflows/maven_adhoc.yml b/.github/workflows/maven_adhoc.yml
index 7f17fd010..0fc7bfc65 100644
--- a/.github/workflows/maven_adhoc.yml
+++ b/.github/workflows/maven_adhoc.yml
@@ -65,6 +65,10 @@ jobs:
         mvn -V --batch-mode --file pom.xml --no-transfer-progress test -Dtest=FTPTimestampNET710Test -Drat.skip
         git checkout rel/commons-net-3.10.0
         mvn -V --batch-mode --file pom.xml --no-transfer-progress test -Dtest=FTPTimestampNET710Test -Drat.skip
+        git stash -u
+        git checkout rel/commons-net-3.9.0
+        git stash pop
+        mvn -V --batch-mode --file pom.xml --no-transfer-progress test -Dtest=FTPTimestampNET710Test -Drat.skip
     # - name: Look for deletefile failures
     #   run: |
     #     mvn -V --batch-mode --file pom.xml --no-transfer-progress test -Dtest=TFTPServerPathTest