diff --git a/tests/system/suite_CSUP/tst_CSUP02/test.py b/tests/system/suite_CSUP/tst_CSUP02/test.py
index 7e26bafba47..aacd96a13d7 100644
--- a/tests/system/suite_CSUP/tst_CSUP02/test.py
+++ b/tests/system/suite_CSUP/tst_CSUP02/test.py
@@ -48,6 +48,8 @@ def main():
         type(editorWidget, "<Return>")
         type(editorWidget, "<Up>")
         type(editorWidget, "class")
+        if useClang and JIRA.isBugStillOpen(15639):
+            snooze(8)
         if platform.system() == "Darwin":
             type(editorWidget, "<Meta+Space>")
         else: