diff --git a/pkgs/development/python-modules/flickrapi/default.nix b/pkgs/development/python-modules/flickrapi/default.nix
index 8f08dc8d1a53..9bbd11bd65b6 100644
--- a/pkgs/development/python-modules/flickrapi/default.nix
+++ b/pkgs/development/python-modules/flickrapi/default.nix
@@ -26,6 +26,12 @@ buildPythonPackage rec {
     hash = "sha256-vRZrlXKI0UDdmDevh3XUngH4X8G3VlOCSP0z/rxhIgw=";
   };
 
+  postPatch = ''
+    substituteInPlace tests/test_tokencache.py \
+      --replace-fail "assertEquals" "assertEqual" \
+      --replace-fail "assertNotEquals" "assertNotEqual"
+  '';
+
   build-system = [ setuptools ];
 
   dependencies = [