diff --git a/pkgs/development/python-modules/enlighten/default.nix b/pkgs/development/python-modules/enlighten/default.nix
index 1946aa614974..b808801928e3 100644
--- a/pkgs/development/python-modules/enlighten/default.nix
+++ b/pkgs/development/python-modules/enlighten/default.nix
@@ -36,6 +36,9 @@ buildPythonPackage rec {
   disabledTests = [
     # AssertionError: <_io.TextIOWrapper name='<stdout>' mode='w' encoding='utf-8'> is not...
     "test_init"
+    # AssertionError: Invalid format specifier (deprecated since prefixed 0.4.0)
+    "test_floats_prefixed"
+    "test_subcounter_prefixed"
   ] ++ lib.optionals stdenv.isDarwin [
     # https://github.com/Rockhopper-Technologies/enlighten/issues/44
     "test_autorefresh"