1 files changed, 5 insertions, 1 deletions
diff --git a/Lib/test/regrtest.py b/Lib/test/regrtest.py
index 41fc43b..c432ca4 100755
--- a/Lib/test/regrtest.py
+++ b/Lib/test/regrtest.py
@@ -515,7 +515,11 @@ def main(tests=None, testdir=None, verbose=0, quiet=False,
         tests = iter(selected)
 
     if use_mp:
-        from threading import Thread
+        try:
+            from threading import Thread
+        except ImportError:
+            print("Multiprocess option requires thread support")
+            sys.exit(2)
         from queue import Queue
         from subprocess import Popen, PIPE
         debug_output_pat = re.compile(r"\[\d+ refs\]$")