diff --git a/tests/functional/test_yaml.py b/tests/functional/test_yaml.py
index ceac69fd8..eab11e2a4 100644
--- a/tests/functional/test_yaml.py
+++ b/tests/functional/test_yaml.py
@@ -56,10 +56,14 @@ def handle_install_request(script, requirement):
     result = script.pip(
         "install",
         "--no-index", "--find-links", path_to_url(script.scratch_path),
-        requirement
+        requirement, "--verbose",
+        allow_stderr_error=True,
+        allow_stderr_warning=True,
     )
 
-    retval = {}
+    retval = {
+        "_result_object": result,
+    }
     if result.returncode == 0:
         # Check which packages got installed
         retval["install"] = []
@@ -140,4 +144,7 @@ def test_yaml_based(script, case):
         # Perform the requested action
         effect = available_actions[action](script, request[action])
 
-        assert effect == expected, "Fixture did not succeed."
+        result = effect["_result_object"]
+        del effect["_result_object"]
+
+        assert effect == expected, str(result)
diff --git a/tests/lib/__init__.py b/tests/lib/__init__.py
index 576cc6edd..6b5b283d0 100644
--- a/tests/lib/__init__.py
+++ b/tests/lib/__init__.py
@@ -924,7 +924,7 @@ def create_basic_wheel_for_package(script, name, version,
         extras = {}
     files = {
         "{name}/__init__.py": """
-            __version__ = {version}
+            __version__ = {version!r}
             def hello():
                 return "Hello From {name}"
         """,