--- a/tests/test-stdio.py	Tue Jul 07 11:06:37 2020 +0200
+++ b/tests/test-stdio.py	Tue Jul 07 12:35:29 2020 +0200
@@ -99,6 +99,9 @@
                 self.assertEqual(
                     _readall(stream_receiver, 1024), expected_output
                 )
+            except:  # re-raises
+                proc.terminate()
+                raise
             finally:
                 retcode = proc.wait()
             self.assertEqual(retcode, 0)