diff --git a/README.md b/README.md
index 4b83779..1bf14aa 100644
--- a/README.md
+++ b/README.md
@@ -139,7 +139,7 @@ For example `#!/usr/bin/python3 -Ru` will be updated to `#!/usr/bin/python3 -sRu
 Sometimes, this can interfere with tests that run such scripts directly by name,
 because in tests we usually rely on `PYTHONPATH` (and `-s` ignores that).
 Would this behavior be undesired for any reason,
-undefine `%{py3_shbang_opt}` to turn it of.
+undefine `%{py3_shbang_opt}` to turn it off.
 
 Extras are currently ignored.
 
diff --git a/tests/mocktest.sh b/tests/mocktest.sh
index 57caf42..7a0c52d 100755
--- a/tests/mocktest.sh
+++ b/tests/mocktest.sh
@@ -17,7 +17,7 @@ if [ ! -f $config ]; then
   original="/etc/mock/fedora-${fedora}-x86_64.cfg"
   cp $original $config
 
-  echo -e '\n\nconfig_opts["yum.conf"] += """' >> $config
+  echo -e '\n\nconfig_opts[f"{config_opts.package_manager}.conf"] += """' >> $config
   cat /etc/yum.repos.d/test-pyproject-rpm-macros.repo >> $config
   echo -e '\n"""\n' >> $config
 fi