diff --git a/marshalparser.spec b/marshalparser.spec
index 598c414..ebe89f2 100644
--- a/marshalparser.spec
+++ b/marshalparser.spec
@@ -1,6 +1,6 @@
 Name:           marshalparser
 Version:        0.3.0
-Release:        2%{?dist}
+Release:        3%{?dist}
 Summary:        Parser for Python internal Marshal format
 
 License:        MIT
@@ -11,15 +11,11 @@ BuildArch:      noarch
 BuildRequires:  python3-devel
 BuildRequires:  pyproject-rpm-macros
 
-# For tests on various pyc files
-BuildRequires:  python3.6
-BuildRequires:  python3.7
-BuildRequires:  python3.8
-BuildRequires:  python3.9
-BuildRequires:  python3.10
+# Test dependencies
+BuildRequires:  python3-pytest
 
 %generate_buildrequires
-%pyproject_buildrequires -t
+%pyproject_buildrequires
 
 %description
 Parser for Python internal Marshal format which can fix pyc files
@@ -28,6 +24,10 @@ reproducibility.
 %prep
 %autosetup
 
+# Remove tests for Python versions that we don't ship, leave 3.9.
+# They are skipped automatically, but it takes a long time.
+rm -rf test/python_stdlib/{3.10,3.11,3.6,3.7,3.8}
+
 %build
 %pyproject_wheel
 
@@ -36,7 +36,7 @@ reproducibility.
 %pyproject_save_files %{name}
 
 %check
-%tox
+%pytest -v test.py
 
 %files -f %{pyproject_files}
 %license LICENSE
@@ -44,6 +44,9 @@ reproducibility.
 %{_bindir}/%{name}
 
 %changelog
+* Thu Mar 03 2022 Tomas Orsava <torsava@redhat.com> - 0.3.0-3
+- Convert spec file to CentOS Stream 9 and RHEL 9
+
 * Thu Jan 20 2022 Fedora Release Engineering <releng@fedoraproject.org> - 0.3.0-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_36_Mass_Rebuild
 
@@ -85,4 +88,3 @@ reproducibility.
 
 * Wed Jul 15 2020 Lumír Balhar <lbalhar@redhat.com> - 0.1.1-1
 - Initial package
-