diff --git a/python-filelock.spec b/python-filelock.spec
index f1b4c07..6de9507 100644
--- a/python-filelock.spec
+++ b/python-filelock.spec
@@ -32,6 +32,7 @@ BuildRequires:  %{python_module pip}
 BuildRequires:  %{python_module pytest-asyncio}
 BuildRequires:  %{python_module pytest-mock}
 BuildRequires:  %{python_module pytest}
+BuildRequires:  %{python_module virtualenv}
 BuildRequires:  %{python_module wheel}
 BuildRequires:  fdupes
 BuildRequires:  python-rpm-macros