diff --git a/.travis.yml b/.travis.yml
index a3ff22fb09b7..4a1c310c9420 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,6 +7,12 @@ install: pip install -r requirements.txt
 before_script:
   - black --check . || true
   - flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
+#matrix:
+#  include:
+#    - script: pytest --doctest-modules -v data_structures         # These tests currently fail.  See: #989
+#    - script: pytest --doctest-modules -v file_transfer_protocol  # These tests currently fail.  See: #983
+#    - script: pytest --doctest-modules -v machine_learning        # These tests currently fail.  See: #985
+#    - script: pytest --doctest-modules -v maths                   # These tests currently fail.  See: #986
 script:
   - mypy --ignore-missing-imports .
   - pytest . --doctest-modules