diff --git a/setup.py b/setup.py
index 528d34d0d7..ab7fbb873e 100755
--- a/setup.py
+++ b/setup.py
@@ -65,7 +65,7 @@
         'pytest-env',
         'pytest-html!=2.1.0',
         'pytest-metadata>=1.5.1',
-        'pytest-mypy',
+        'pytest-mypy<0.10.1',
         'pytest-mock',
         'pytest-xdist',
         'ESMValTool_sample_data==0.0.3',