diff --git a/swh/indexer/tests/test_metadata.py b/swh/indexer/tests/test_metadata.py
--- a/swh/indexer/tests/test_metadata.py
+++ b/swh/indexer/tests/test_metadata.py
@@ -7,6 +7,7 @@
 import unittest
 
 from hypothesis import HealthCheck, given, settings, strategies
+import pytest
 
 from swh.indexer.codemeta import CODEMETA_TERMS
 from swh.indexer.metadata import ContentMetadataIndexer, RevisionMetadataIndexer
@@ -405,7 +406,10 @@
             },
         )
 
-    def test_detect_metadata_package_json(self):
+    @pytest.mark.parametrize(
+        "filename", [b"package.json", b"Package.json", b"PACKAGE.json", b"PACKAGE.JSON"]
+    )
+    def test_detect_metadata_package_json(self, filename):
         # given
         df = [
             {
@@ -421,7 +425,7 @@
             },
             {
                 "sha1_git": b"aab",
-                "name": b"package.json",
+                "name": filename,
                 "target": b"aab",
                 "length": 712,
                 "status": "visible",
@@ -436,29 +440,7 @@
 
         expected_results = {"NpmMapping": [b"cde"]}
         # then
-        self.assertEqual(expected_results, results)
-
-    def test_detect_metadata_package_uppercase_npm(self):
-        # given
-        df = [
-            {
-                "sha1git": b"def",
-                "name": b"PACKAGE.json",
-                "target": b"def",
-                "length": 897,
-                "status": "visible",
-                "type": "file",
-                "perms": 33188,
-                "dir_id": b"dir_a",
-                "sha1": b"xyz",
-            },
-        ]
-        # when
-        results = detect_metadata(df)
-
-        expected_results = {"NpmMapping": [b"xyz"]}
-        # then
-        self.assertEqual(expected_results, results)
+        assert expected_results == results
 
     def test_detect_metadata_codemeta_json_uppercase(self):
         # given