diff --git a/aider/main.py b/aider/main.py
index 130f07671..b5a8fa1eb 100644
--- a/aider/main.py
+++ b/aider/main.py
@@ -853,9 +853,9 @@ def main(argv=None, input=None, output=None, force_git_root=None, return_coder=F
             io.tool_error("No --test-cmd provided.")
             analytics.event("exit", reason="No test command provided")
             return 1
-        test_errors = coder.commands.cmd_test(args.test_cmd)
-        if test_errors:
-            coder.run(test_errors)
+        coder.commands.cmd_test(args.test_cmd)
+        if io.placeholder:
+            coder.run(io.placeholder)
 
     if args.commit:
         if args.dry_run: