diff --git a/pkgs/development/python-modules/pytest-mpl/default.nix b/pkgs/development/python-modules/pytest-mpl/default.nix
index aa73d3ccaed..d86647b7503 100644
--- a/pkgs/development/python-modules/pytest-mpl/default.nix
+++ b/pkgs/development/python-modules/pytest-mpl/default.nix
@@ -4,6 +4,7 @@
 , pytest
 , matplotlib
 , nose
+, pillow
 }:
 
 buildPythonPackage rec {
@@ -20,6 +21,7 @@ buildPythonPackage rec {
   propagatedBuildInputs = [
     matplotlib
     nose
+    pillow
   ];
 
   checkInputs = [