diff --git a/stack_orchestrator/deploy/k8s/cluster_info.py b/stack_orchestrator/deploy/k8s/cluster_info.py
index 8ff5e8ca..9806584b 100644
--- a/stack_orchestrator/deploy/k8s/cluster_info.py
+++ b/stack_orchestrator/deploy/k8s/cluster_info.py
@@ -231,7 +231,8 @@ class ClusterInfo:
                         service_info["environment"]), self.environment_variables.map
                         ) if "environment" in service_info else self.environment_variables.map
                 envs = envs_from_environment_variables_map(merged_envs)
-                print(f"Merged envs: {envs}")
+                if opts.o.debug:
+                    print(f"Merged envs: {envs}")
                 # Re-write the image tag for remote deployment
                 image_to_use = remote_tag_for_image(
                     image, self.spec.get_image_registry()) if self.spec.get_image_registry() is not None else image
diff --git a/tests/deploy/run-deploy-test.sh b/tests/deploy/run-deploy-test.sh
index 763cde8b..f7a008f3 100755
--- a/tests/deploy/run-deploy-test.sh
+++ b/tests/deploy/run-deploy-test.sh
@@ -6,6 +6,12 @@ fi
 # Dump environment variables for debugging
 echo "Environment variables:"
 env
+
+delete_cluster_exit () {
+    $TEST_TARGET_SO deployment --dir $test_deployment_dir stop --delete-volumes
+    exit 1
+}
+
 # Test basic stack-orchestrator deploy
 echo "Running stack-orchestrator deploy test"
 # Bit of a hack, test the most recent package
@@ -106,6 +112,10 @@ if [ ! "$create_file_content" == "create-command-output-data"  ]; then
     echo "deploy create test: FAILED"
     exit 1
 fi
+
+# Add a config file to be picked up by the ConfigMap before starting.
+echo "dbfc7a4d-44a7-416d-b5f3-29842cc47650" > $test_deployment_dir/data/test-config/test_config
+
 echo "deploy create output file test: passed"
 # Try to start the deployment
 $TEST_TARGET_SO deployment --dir $test_deployment_dir start
@@ -131,6 +141,30 @@ else
     echo "deployment compose config test: FAILED"
     exit 1
 fi
+
+# Check that the ConfigMap is mounted and contains the expected content.
+log_output_4=$( $TEST_TARGET_SO deployment --dir $test_deployment_dir logs )
+if [[ "$log_output_4" == *"/config/test_config:"* ]] && [[ "$log_output_4" == *"dbfc7a4d-44a7-416d-b5f3-29842cc47650"* ]]; then
+    echo "deployment ConfigMap test: passed"
+else
+    echo "deployment ConfigMap test: FAILED"
+    delete_cluster_exit
+fi
+
+# Stop then start again and check the volume was preserved
+$TEST_TARGET_SO deployment --dir $test_deployment_dir stop
+# Sleep a bit just in case
+# sleep for longer to check if that's why the subsequent create cluster fails
+sleep 20
+$TEST_TARGET_SO deployment --dir $test_deployment_dir start
+log_output_5=$( $TEST_TARGET_SO deployment --dir $test_deployment_dir logs )
+if [[ "$log_output_5" == *"Filesystem is old"* ]]; then
+    echo "Retain volumes test: passed"
+else
+    echo "Retain volumes test: FAILED"
+    delete_cluster_exit
+fi
+
 # Stop and clean up
 $TEST_TARGET_SO deployment --dir $test_deployment_dir stop --delete-volumes
 echo "Test passed"
diff --git a/tests/k8s-deploy/run-deploy-test.sh b/tests/k8s-deploy/run-deploy-test.sh
index 04008217..4b17ae49 100755
--- a/tests/k8s-deploy/run-deploy-test.sh
+++ b/tests/k8s-deploy/run-deploy-test.sh
@@ -114,6 +114,7 @@ else
     echo "deployment logs test: FAILED"
     delete_cluster_exit
 fi
+
 # Check the config variable CERC_TEST_PARAM_1 was passed correctly
 if [[ "$log_output_3" == *"Test-param-1: PASSED"* ]]; then
     echo "deployment config test: passed"
@@ -122,6 +123,14 @@ else
     delete_cluster_exit
 fi
 
+# Check the config variable CERC_TEST_PARAM_2 was passed correctly from the compose file
+if [[ "$log_output_3" == *"Test-param-2: CERC_TEST_PARAM_2_VALUE"* ]]; then
+    echo "deployment compose config test: passed"
+else
+    echo "deployment compose config test: FAILED"
+    exit 1
+fi
+
 # Check that the ConfigMap is mounted and contains the expected content.
 log_output_4=$( $TEST_TARGET_SO deployment --dir $test_deployment_dir logs )
 if [[ "$log_output_4" == *"/config/test_config:"* ]] && [[ "$log_output_4" == *"dbfc7a4d-44a7-416d-b5f3-29842cc47650"* ]]; then