diff --git a/plugins/testng/src/com/theoryinpractice/testng/util/TestNGUtil.java b/plugins/testng/src/com/theoryinpractice/testng/util/TestNGUtil.java
index 38fd89d5e695..0375b4a1b260 100644
--- a/plugins/testng/src/com/theoryinpractice/testng/util/TestNGUtil.java
+++ b/plugins/testng/src/com/theoryinpractice/testng/util/TestNGUtil.java
@@ -436,7 +436,7 @@ public class TestNGUtil {
       public void run() {
         final ProgressIndicator indicator = ProgressManager.getInstance().getProgressIndicator();
 
-        final Collection<PsiClass> set = new HashSet<PsiClass>();
+        final Collection<PsiClass> set = new LinkedHashSet<PsiClass>();
         PsiManager manager = PsiManager.getInstance(filter.getProject());
         GlobalSearchScope scope = filter.getScope();
         GlobalSearchScope projectScope = GlobalSearchScope.projectScope(manager.getProject());