diff --git a/tests/fake-requirements.spec b/tests/fake-requirements.spec
index bc86033..795c49b 100644
--- a/tests/fake-requirements.spec
+++ b/tests/fake-requirements.spec
@@ -23,5 +23,8 @@ EOF
 
 %check
 pip show toml click
-! pip show setuptools
-! pip show wheel
+%if 0%{?fedora} > 34 || 0%{?rhel} > 9
+# On F34, python3-devel requires (python3-setuptools if rpm-build)
+pip show setuptools && exit 1 || true
+%endif
+pip show wheel && exit 1 || true
diff --git a/tests/python-entrypoints.spec b/tests/python-entrypoints.spec
index aa6d2d9..2591ed0 100644
--- a/tests/python-entrypoints.spec
+++ b/tests/python-entrypoints.spec
@@ -42,8 +42,8 @@ Summary:        %{summary}
 
 %check
 # Internal check: Top level __pycache__ is never owned
-! grep -E '/__pycache__$' %{pyproject_files}
-! grep -E '/__pycache__/$' %{pyproject_files}
+grep -E '/__pycache__$' %{pyproject_files} && exit 1 || true
+grep -E '/__pycache__/$' %{pyproject_files} && exit 1 || true
 grep -F '/__pycache__/' %{pyproject_files}
 
 
diff --git a/tests/python-isort.spec b/tests/python-isort.spec
index 2881fa5..069e3d3 100644
--- a/tests/python-isort.spec
+++ b/tests/python-isort.spec
@@ -47,7 +47,7 @@ test -d %{buildroot}%{python3_sitelib}/%{modname}/
 test -d %{buildroot}%{python3_sitelib}/%{modname}-%{version}.dist-info/
 
 # Internal check that executables are not present when +auto was not used with %%pyproject_save_files
-! grep -F %{_bindir}/%{modname} %{pyproject_files}
+grep -F %{_bindir}/%{modname} %{pyproject_files} && exit 1 || true
 
 
 %files -n python3-%{modname} -f %{pyproject_files}
diff --git a/tests/python-ldap.spec b/tests/python-ldap.spec
index fef1bd4..a08b605 100644
--- a/tests/python-ldap.spec
+++ b/tests/python-ldap.spec
@@ -54,7 +54,7 @@ rm Tests/t_ldapobject.py Tests/t_cext.py Tests/t_edit.py Tests/t_ldap_sasl.py Te
 %build
 %pyproject_wheel
 # Internal check that we can import the built extension modules from %%{pyproject_build_lib}
-! %{python3} -c 'import _ldap'
+%{python3} -c 'import _ldap' && exit 1 || true
 PYTHONPATH=%{pyproject_build_lib} %{python3} -c 'import _ldap'
 
 
@@ -78,14 +78,14 @@ test -f %{buildroot}%{python3_sitearch}/_ldap.cpython-*.so
 
 # Internal check: Unmatched modules are not supposed to be listed in %%{pyproject_files}
 # We'll list them explicitly
-! grep -F %{python3_sitearch}/ldif.py %{pyproject_files}
-! grep -F %{python3_sitearch}/__pycache__/ldif.cpython-%{python3_version_nodots}.pyc %{pyproject_files}
-! grep -F %{python3_sitearch}/__pycache__/ldif.cpython-%{python3_version_nodots}.opt-1.pyc %{pyproject_files}
-! grep -F %{python3_sitearch}/slapdtest %{pyproject_files}
+grep -F %{python3_sitearch}/ldif.py %{pyproject_files} && exit 1 || true
+grep -F %{python3_sitearch}/__pycache__/ldif.cpython-%{python3_version_nodots}.pyc %{pyproject_files} && exit 1 || true
+grep -F %{python3_sitearch}/__pycache__/ldif.cpython-%{python3_version_nodots}.opt-1.pyc %{pyproject_files} && exit 1 || true
+grep -F %{python3_sitearch}/slapdtest %{pyproject_files} && exit 1 || true
 
 # Internal check: Top level __pycache__ is never owned
-! grep -E '/site-packages/__pycache__$' %{pyproject_files}
-! grep -E '/site-packages/__pycache__/$' %{pyproject_files}
+grep -E '/site-packages/__pycache__$' %{pyproject_files} && exit 1 || true
+grep -E '/site-packages/__pycache__/$' %{pyproject_files} && exit 1 || true
 
 # Internal check for the value of %%{pyproject_build_lib} in an archful package
 %if 0%{?fedora} >= 36 || 0%{?rhel} >= 10