diff --git a/pkgs/development/python-modules/diff-cover/default.nix b/pkgs/development/python-modules/diff-cover/default.nix
index 1fc50c5ef23..7d7a9afcd30 100644
--- a/pkgs/development/python-modules/diff-cover/default.nix
+++ b/pkgs/development/python-modules/diff-cover/default.nix
@@ -26,7 +26,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     pname = "diff_cover";
     inherit version;
-    sha256 = "sha256-N2O0/C75EGO6crUCFGUiJLLQqfMVRNVQRZb1xKhHzXs=";
+    hash = "sha256-N2O0/C75EGO6crUCFGUiJLLQqfMVRNVQRZb1xKhHzXs=";
   };
 
   propagatedBuildInputs = [
@@ -54,6 +54,16 @@ buildPythonPackage rec {
     "test_style_defs"
     # uses pytest.approx in a boolean context, which is unsupported since pytest7
     "test_percent_covered"
+    # assert '<!DOCTYPE ht...ody>\n</html>' == '<!DOCTYPE ht...ody>\n</html>'
+    "test_html_with_external_css"
+    # assert '<table class...</tr></table>' == '<div class=".../table></div>'
+    "test_format"
+    "test_format_with_invalid_violation_lines"
+    "test_no_filename_ext"
+    "test_unicode"
+    "test_load_snippets_html"
+    "test_load_utf8_snippets"
+    "test_load_declared_arabic"
   ];
 
   pythonImportsCheck = [