diff --git a/src/com/mirantis/mk/Test.groovy b/src/com/mirantis/mk/Test.groovy
index 0355544..0c4f5f0 100644
--- a/src/com/mirantis/mk/Test.groovy
+++ b/src/com/mirantis/mk/Test.groovy
@@ -69,7 +69,7 @@
                                     "-e SOURCE_FILE=${sourceFile} " +
                                     "-e LOG_DIR=${logDir} " +
                                     "-e SET=${set} " +
-                                    "-e CUSTOM=\"${custom}\" " +
+                                    "-e CUSTOM='${custom}' " +
                                     "-e CONCURRENCY=${concurrency} " +
                                     "-e TEMPEST_CONF=${tempestConf} " +
                                     "-e SKIP_LIST=${skipList} " +