diff --git a/emulators/ares.yml b/emulators/ares.yml
index 324c04c8..afe61555 100644
--- a/emulators/ares.yml
+++ b/emulators/ares.yml
@@ -168,7 +168,7 @@ files:
 
   # --- Mega CD ---
   # Also used by Mega CD 32X (desktop-ui/emulator/mega-cd-32x.cpp)
-  - name: bios_CD_U.bin
+  - name: SegaCDBIOS9303.bin
     system: mega-cd
     region: [north-america]
     required: true
@@ -177,7 +177,7 @@ files:
     description: "Mega CD / Sega CD BIOS (US)"
     source_ref: "desktop-ui/emulator/mega-cd.cpp:17"
 
-  - name: bios_CD_J.bin
+  - name: jp_mcd2_921222.bin
     system: mega-cd
     region: [japan]
     required: true
@@ -186,7 +186,7 @@ files:
     description: "Mega CD BIOS (Japan)"
     source_ref: "desktop-ui/emulator/mega-cd.cpp:18"
 
-  - name: bios_CD_E.bin
+  - name: eu_mcd2_9303.bin
     system: mega-cd
     region: [europe, oceania]
     required: true
@@ -216,7 +216,7 @@ files:
     source_ref: "desktop-ui/emulator/mega-ld.cpp:17"
 
   # --- MSX ---
-  - name: MSX.ROM
+  - name: msx-japanese.rom
     system: msx
     required: true
     sha256: "413a2b601a94b3792e054be2439cc77a1819cceadbfa9542f88d51c7480f2ef0"
@@ -225,7 +225,7 @@ files:
     source_ref: "desktop-ui/emulator/msx.cpp:19"
 
   # --- MSX2 ---
-  - name: MSX2.ROM
+  - name: MSX2J.rom
     system: msx2
     required: true
     sha256: "0c672d86ead61a97f49a583b88b7c1905da120645cd44f0c9f2baf4f4631e0b1"
diff --git a/tests/test_audit_regressions.py b/tests/test_audit_regressions.py
index 20ee27c7..9a78a0e5 100644
--- a/tests/test_audit_regressions.py
+++ b/tests/test_audit_regressions.py
@@ -5220,5 +5220,32 @@ class VerifyPacksRefusesWhatItCannotDo(unittest.TestCase):
                 self.assertFalse((Path(out) / ".lock").exists())
 
 
+class AHashScanningCoreContradictsNoPlatform(unittest.TestCase):
+    """ares finds its firmware by sha256 in a folder and opens no file by
+    name, so its entries' names are labels. Labels reused from other dumps
+    (MSX2.ROM, bios_CD_U.bin) put ares's revision on a path where RetroBat
+    pins another: slots called RetroBat's declaration wrong, and the pack
+    dropped ares's own dump behind the platform's."""
+
+    def test_no_conflict_names_ares(self):
+        import json
+
+        from scripts import slots
+        from scripts.common import list_registered_platforms, load_emulator_profiles
+
+        root = ROOT
+        if not (root / "database.json").exists():
+            self.skipTest("database.json is not built")
+        profiles = load_emulator_profiles(str(root / "emulators"))
+        db = json.loads((root / "database.json").read_text(encoding="utf-8"))
+        claimed = [
+            (platform, conflict.destination)
+            for platform in list_registered_platforms(str(root / "platforms"), include_archived=True)
+            for conflict in slots.scan_platform(platform, profiles, db, str(root / "platforms"))
+            if any(claim.emulator == "ares" for claim in conflict.profile_claims)
+        ]
+        self.assertEqual(claimed, [])
+
+
 if __name__ == "__main__":
     unittest.main()