diff --git a/mmv1/third_party/terraform/.teamcity/components/builds/build_steps.kt b/mmv1/third_party/terraform/.teamcity/components/builds/build_steps.kt
index 4faed1046b65..78f942cf380d 100644
--- a/mmv1/third_party/terraform/.teamcity/components/builds/build_steps.kt
+++ b/mmv1/third_party/terraform/.teamcity/components/builds/build_steps.kt
@@ -118,7 +118,7 @@ fun BuildSteps.runAcceptanceTests() {
                   exit 0
                 fi
                 
-                export TEST_COUNT=${'$'}(./test-binary -test.list=%TEST_PREFIX% | wc -l)
+                export TEST_COUNT=${'$'}(./test-binary -test.list="%TEST_PREFIX%" | wc -l)
                 echo "Found ${'$'}{TEST_COUNT} tests that match the given test prefix %TEST_PREFIX%"
                 if test ${'$'}TEST_COUNT -le "0"; then
                   echo "Skipping test execution; no tests to run"