diff --git a/pkgs/development/python-modules/keras/default.nix b/pkgs/development/python-modules/keras/default.nix
index d33143d829d5..f35ff2252362 100644
--- a/pkgs/development/python-modules/keras/default.nix
+++ b/pkgs/development/python-modules/keras/default.nix
@@ -39,7 +39,7 @@ buildPythonPackage rec {
   src = fetchFromGitHub {
     owner = "keras-team";
     repo = "keras";
-    rev = "refs/tags/v${version}";
+    tag = "v${version}";
     hash = "sha256-qidY1OmlOYPKVoxryx1bEukA7IS6rPV4jqlnuf3y39w=";
   };
 
@@ -86,6 +86,10 @@ buildPythonPackage rec {
 
       # TypeError: this __dict__ descriptor does not support '_DictWrapper' objects
       "test_reloading_default_saved_model"
+
+      # ValueError: The truth value of an empty array is ambiguous.
+      # Use `array.size > 0` to check that an array is not empty.
+      "test_min_max_norm"
     ]
     ++ lib.optionals stdenv.isDarwin [
       # AttributeError: module 'numpy' has no attribute 'float128'. Did you mean: 'float16'?