diff --git a/contrib/heptapod-ci.yml b/contrib/heptapod-ci.yml
--- a/contrib/heptapod-ci.yml
+++ b/contrib/heptapod-ci.yml
@@ -135,7 +135,7 @@
       - make local PYTHON=$PYTHON
       - $PYTHON -m pip install --user -U pytype==2021.04.15
     variables:
-        RUNTEST_ARGS: " --allow-slow-tests tests/test-check-pytype.t"
+        RUNTEST_ARGS: " --allow-slow-tests tests/test-check-pytype.t --timeout 3600"
         PYTHON: python3
         TEST_HGMODULEPOLICY: "c"