1 files changed, 6 insertions, 2 deletions
diff --git a/pkgs/development/python-modules/testing-common-database/default.nix b/pkgs/development/python-modules/testing-common-database/default.nix
index ff323b85e720f..021b3e7ef7e2f 100644
--- a/pkgs/development/python-modules/testing-common-database/default.nix
+++ b/pkgs/development/python-modules/testing-common-database/default.nix
@@ -1,4 +1,8 @@
-{ lib, buildPythonPackage, fetchPypi  }:
+{
+  lib,
+  buildPythonPackage,
+  fetchPypi,
+}:
 
 buildPythonPackage rec {
   pname = "testing.common.database";
@@ -9,7 +13,7 @@ buildPythonPackage rec {
     sha256 = "0wvdv0frl7xib05sixjv9m6jywaa2wdhdhsqqdfk45akk2r80pcn";
   };
 
-  postPatch =  ''
+  postPatch = ''
     substituteInPlace src/testing/common/database.py \
       --replace "collections.Callable" "collections.abc.Callable"
   '';