diff --git a/rever.xsh b/rever.xsh
index d745e8bc..9efa8acd 100644
--- a/rever.xsh
+++ b/rever.xsh
@@ -17,7 +17,8 @@ def run_tests():
     # Don't use the built-in pytest action because that uses Docker, which is
     # overkill and requires installing Docker
     with run_in_conda_env(['python=3.8', 'pytest', 'hypothesis', 'sympy',
-                           'pyflakes', 'pytest-cov', 'pytest-flakes']):
+                           'pyflakes', 'pytest-cov', 'pytest-flakes',
+                           'mkl']):
         # Until numpy 1.20 is out, the tests require the git version to run
         pip install git+https://github.com/numpy/numpy.git
         pyflakes .