diff --git a/.travis.yml b/.travis.yml
index cf184a9..2bccb56 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -19,6 +19,11 @@ install:
     - sudo apt-get install graphviz
 script:
     - check-manifest
+    - |
+      if [[ "$TRAVIS_PYTHON_VERSION" == "nightly" ]]; then
+         # on nightly fake parso known the grammar
+         cp /home/travis/virtualenv/python3.8-dev/lib/python3.8/site-packages/parso/python/grammar37.txt /home/travis/virtualenv/python3.8-dev/lib/python3.8/site-packages/parso/python/grammar38.txt
+      fi
     - cd /tmp && iptest --coverage xml && cd -
     # On the latest Python only, make sure that the docs build.
     - |