1 files changed, 3 insertions, 1 deletions
diff --git a/tox.ini b/tox.ini
index cf5c3d6..851826a 100644
--- a/tox.ini
+++ b/tox.ini
@@ -12,9 +12,11 @@ commands =
 
 [testenv:pygments]
 # Run tests with pygments installed (override deps only).
+setenv =
+    PYGMENTS_VERSION = 2.7.1
 deps =
     pytidylib
-    pygments==2.7.1
+    pygments=={env:PYGMENTS_VERSION}
 
 [testenv:flake8]
 deps = flake8