matplotlib · mdboom · May 21, 2018
diff --git a/.travis.yml b/.travis.yml
@@ -72,6 +72,7 @@ env:
    - PYTHONFAULTHANDLER=1
    - PYTEST_ADDOPTS="-rawR --maxfail=50 --timeout=300 --durations=25 --cov-report= --cov=lib -n $NPROC"
    - RUN_PEP8=
+    - MINIMAL_PYTHON=

 matrix:
  include:
@@ -87,6 +88,11 @@ matrix:
        - PYTEST=pytest==3.4
        - PYTEST_COV=pytest-cov==2.3.1
        - SPHINX=sphinx==1.3
+        # Build a minimal Python configuration where the optional modules have
+        # been removed. The file in tools/Setup.dist should be updated from the
+        # CPython repository when the version of Python being tested has
+        # changed.
+        - MINIMAL_PYTHON=true
    - python: 3.5
      env:
        # - PYTHONOPTIMIZE=2  # This currently doesn't work.
@@ -182,6 +188,12 @@ install:
  - |
    # Install matplotlib
    python -mpip install -ve .
+  - |
+    # If this is meant to be a minimal python, remove optional modules now
+    if [[ $MINIMAL_PYTHON == 'true' ]] then
+      python tools/create_minimal_python.py
+      export PATH=$PWD/minimal_python/bin:$PATH
+    fi

 before_script: |
  if [[ $TRAVIS_OS_NAME != 'osx' ]]; then

diff --git a/lib/matplotlib/sphinxext/tests/test_tinypages.py b/lib/matplotlib/sphinxext/tests/test_tinypages.py
@@ -15,6 +15,20 @@
    reason="'{} -msphinx' does not return 0".format(sys.executable))


+try:
+    import multiprocessing
+    HAS_MULTIPROCESSING = True
+except ImportError:
+    HAS_MULTIPROCESSING = False
+
+
+needs_multiprocessing = pytest.mark.skipif(
+    not HAS_MULTIPROCESSING,
+    reason="needs multiprocessing")
+
+
+@needs_sphinx
+@needs_multiprocessing
 def test_tinypages(tmpdir):
    html_dir = pjoin(str(tmpdir), 'html')
    doctree_dir = pjoin(str(tmpdir), 'doctrees')