diff --git a/tests/conftest.py b/tests/conftest.py
index 76f14c80..bade0a1a 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -17,7 +17,6 @@
 """
 
 import os
-import pipes
 import shlex
 import subprocess
 import time
@@ -218,7 +217,7 @@ def reportinfo(self):
     def repr_failure(self, excinfo):
         err = excinfo.value
         if isinstance(err, SystemExit):
-            cmd = f'jupyter-repo2docker {" ".join(map(pipes.quote, self.args))}'
+            cmd = f'jupyter-repo2docker {" ".join(map(shlex.quote, self.args))}'
             return f"{cmd} | exited with status={err.code}"
         else:
             return super().repr_failure(excinfo)