diff --git a/tests/deploy/run-deploy-test.sh b/tests/deploy/run-deploy-test.sh
index c5e87ebf..3add14ce 100755
--- a/tests/deploy/run-deploy-test.sh
+++ b/tests/deploy/run-deploy-test.sh
@@ -132,7 +132,7 @@ original_marker_content=$(<$test_data_marker)
 # Also save original spec content to compare
 original_spec_content=$(<$test_deployment_spec)
 # Modify spec file to simulate an update
-sed -i.bak 's/CERC_TEST_PARAM_3=FAST/CERC_TEST_PARAM_3=FASTER/' $test_deployment_spec
+sed -i.bak 's/CERC_TEST_PARAM_3:/CERC_TEST_PARAM_3: FASTER/' $test_deployment_spec
 # Run sync to update deployment files without destroying data
 $TEST_TARGET_SO --stack test deploy create --spec-file $test_deployment_spec --deployment-dir $test_deployment_dir --sync
 # Verify the spec file was updated in deployment dir