diff --git a/contrib/heptapod-ci.yml b/contrib/heptapod-ci.yml
--- a/contrib/heptapod-ci.yml
+++ b/contrib/heptapod-ci.yml
@@ -141,7 +141,7 @@
       - $PYTHON -m pip install --user -U pytype==2021.04.15
     variables:
         RUNTEST_ARGS: " --allow-slow-tests tests/test-check-pytype.t"
-        HGTEST_TIMEOUT: "3600"
+        HGTEST_SLOWTIMEOUT: "3600"
         PYTHON: python3
         TEST_HGMODULEPOLICY: "c"