diff --git a/emulators/aethersx2.yml b/emulators/aethersx2.yml
index ae3851eb9..2f63e2e41 100644
--- a/emulators/aethersx2.yml
+++ b/emulators/aethersx2.yml
@@ -102,6 +102,7 @@ notes: |
 
 files:
   - name: ps2-0230a-20080220.bin
+    found_by: content
     path: bios/ps2-0230a-20080220.bin
     required: true
     min_size: 4194304
diff --git a/emulators/armsx2.yml b/emulators/armsx2.yml
index 7db9c5be5..ea9bc68c8 100644
--- a/emulators/armsx2.yml
+++ b/emulators/armsx2.yml
@@ -163,6 +163,7 @@ notes: |
 
 files:
   - name: ps2-0230a-20080220.bin
+    found_by: content
     path: pcsx2/bios/ps2-0230a-20080220.bin
     aliases: [ps2-0250j-20100415.bin]
     standalone_path: bios/ps2-0230a-20080220.bin
diff --git a/emulators/lrps2.yml b/emulators/lrps2.yml
index 8977a465b..4bf7b0d92 100644
--- a/emulators/lrps2.yml
+++ b/emulators/lrps2.yml
@@ -45,6 +45,7 @@ data_directories:
 
 files:
   - name: "<bios>.bin"
+    found_by: content
     path: "pcsx2/bios/<bios>.bin"
     required: true
     description: "PS2 BIOS binary"
diff --git a/emulators/nethersx2-turnip-classic.yml b/emulators/nethersx2-turnip-classic.yml
index ee33915d6..8b4994455 100644
--- a/emulators/nethersx2-turnip-classic.yml
+++ b/emulators/nethersx2-turnip-classic.yml
@@ -168,6 +168,7 @@ notes: |
 
 files:
   - name: ps2-0230a-20080220.bin
+    found_by: content
     path: bios/ps2-0230a-20080220.bin
     required: true
     min_size: 4194304
diff --git a/emulators/nethersx2-turnip.yml b/emulators/nethersx2-turnip.yml
index 5f71386a0..258f7f4a9 100644
--- a/emulators/nethersx2-turnip.yml
+++ b/emulators/nethersx2-turnip.yml
@@ -149,6 +149,7 @@ notes: |
 
 files:
   - name: ps2-0230a-20080220.bin
+    found_by: content
     path: bios/ps2-0230a-20080220.bin
     required: true
     min_size: 4194304
diff --git a/emulators/nethersx2.yml b/emulators/nethersx2.yml
index b4398c0bf..65075c10f 100644
--- a/emulators/nethersx2.yml
+++ b/emulators/nethersx2.yml
@@ -129,6 +129,7 @@ notes: |
 
 files:
   - name: ps2-0230a-20080220.bin
+    found_by: content
     path: bios/ps2-0230a-20080220.bin
     required: true
     min_size: 4194304
diff --git a/emulators/pcee2.yml b/emulators/pcee2.yml
index 11dea57cf..3c9355b1c 100644
--- a/emulators/pcee2.yml
+++ b/emulators/pcee2.yml
@@ -91,6 +91,7 @@ notes: |
 
 files:
   - name: "<bios>.bin"
+    found_by: content
     path: "pcsx2/bios/<bios>.bin"
     description: "PS2 BIOS image"
     min_size: 4194304
diff --git a/emulators/pcsx2-legacy.yml b/emulators/pcsx2-legacy.yml
index 74ec65c37..fda0bd950 100644
--- a/emulators/pcsx2-legacy.yml
+++ b/emulators/pcsx2-legacy.yml
@@ -77,6 +77,7 @@ notes: |
 
 files:
   - name: ps2-0230a-20080220.bin
+    found_by: content
     system: sony-playstation-2
     required: true
     description: "PS2 console BIOS"
diff --git a/emulators/pcsx2.yml b/emulators/pcsx2.yml
index 693e6f9f0..7c2f5206d 100644
--- a/emulators/pcsx2.yml
+++ b/emulators/pcsx2.yml
@@ -25,6 +25,7 @@ notes: |
 
 files:
   - name: ps2-0230a-20080220.bin
+    found_by: content
     aliases: [ps2-0250j-20100415.bin, SCPH-70004_BIOS_V12_EUR_200.BIN]
     required: true
     min_size: 4194304
diff --git a/emulators/pcsx2x6.yml b/emulators/pcsx2x6.yml
index aeb3ea2cb..7732c22d6 100644
--- a/emulators/pcsx2x6.yml
+++ b/emulators/pcsx2x6.yml
@@ -80,6 +80,7 @@ notes: |
 
 files:
   - name: COH-H31100.rom0
+    found_by: content
     system: namco-system246
     required: true
     min_size: 4194304
diff --git a/emulators/yaps2.yml b/emulators/yaps2.yml
index 07ed63931..fc47f171c 100644
--- a/emulators/yaps2.yml
+++ b/emulators/yaps2.yml
@@ -179,6 +179,7 @@ notes: |
 
 files:
   - name: ps2-0230a-20080220.bin
+    found_by: content
     path: pcsx2/bios/ps2-0230a-20080220.bin
     aliases: [ps2-0250j-20100415.bin]
     standalone_path: bios/ps2-0230a-20080220.bin
diff --git a/tests/test_audit_regressions.py b/tests/test_audit_regressions.py
index 4e191efc2..929ecceea 100644
--- a/tests/test_audit_regressions.py
+++ b/tests/test_audit_regressions.py
@@ -6878,5 +6878,31 @@ class ProfileNotesDescribeTheCoreAlone(unittest.TestCase):
         self.assertEqual(found, [])
 
 
+class Ps2BiosImagesAreFoundByContent(unittest.TestCase):
+    """PCSX2 and its forks scan the BIOS folder and keep the first 4 to 8 MB
+    image with a romdir (pcsx2/ps2/BiosTools.cpp:258-282 at f0523f8a). With
+    no found_by the label ps2-0230a-20080220.bin read as a name the core
+    opens, and the RetroDECK export added it as a required file."""
+
+    def test_every_ps2_image_scan_is_marked(self):
+        import yaml
+
+        from validation import opens_by_name
+
+        named = []
+        for path in sorted((ROOT / "emulators").glob("*.yml")):
+            profile = yaml.safe_load(path.read_text(encoding="utf-8")) or {}
+            if profile.get("bios_mode") != "agnostic":
+                continue
+            for entry in profile.get("files") or []:
+                if (
+                    entry.get("min_size") == 4194304
+                    and entry.get("max_size") == 8388608
+                    and opens_by_name(entry, profile)
+                ):
+                    named.append(f"{path.stem}: {entry['name']}")
+        self.assertEqual(named, [])
+
+
 if __name__ == "__main__":
     unittest.main()