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-rw-r--r--requirements/pytest.pip4
1 files changed, 4 insertions, 0 deletions
diff --git a/requirements/pytest.pip b/requirements/pytest.pip
index 2ad9fb70..541f0b61 100644
--- a/requirements/pytest.pip
+++ b/requirements/pytest.pip
@@ -11,6 +11,10 @@ mock==3.0.5
PyContracts==1.8.12
hypothesis==4.41.2
+# Pin pyparsing because 2.4.3 breaks PyContracts:
+# https://github.com/pyparsing/pyparsing/issues/161
+pyparsing==2.4.2
+
# Our testing mixins
unittest-mixins==1.6
#-e/Users/ned/unittest_mixins