From 9e6590b0978876de14587f528a09632b8879c369 Mon Sep 17 00:00:00 2001
From: Alex Waygood <Alex.Waygood@Gmail.com>
Date: Thu, 3 Aug 2023 22:26:14 +0100
Subject: gh-106368: Argument clinic tests: improve error message when
 `expect_success()` fails (#107606)

---
 Lib/test/test_clinic.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Lib/test/test_clinic.py b/Lib/test/test_clinic.py
index 2f94566..3aa4163 100644
--- a/Lib/test/test_clinic.py
+++ b/Lib/test/test_clinic.py
@@ -1680,7 +1680,8 @@ class ClinicExternalTest(TestCase):
 
     def expect_success(self, *args):
         out, err, code = self.run_clinic(*args)
-        self.assertEqual(code, 0, f"Unexpected failure: {args=}")
+        if code != 0:
+            self.fail("\n".join([f"Unexpected failure: {args=}", out, err]))
         self.assertEqual(err, "")
         return out
 
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