diff --git a/fdroidserver/lint.py b/fdroidserver/lint.py
index fd3d99d8..351667ba 100644
--- a/fdroidserver/lint.py
+++ b/fdroidserver/lint.py
@@ -722,7 +722,13 @@ def check_updates_ucm_http_aum_pattern(app):  # noqa: D403
 
 
 def check_certificate_pinned_binaries(app):
-    if len(app.get('AllowedAPKSigningKeys')) > 0:
+    keys = app.get('AllowedAPKSigningKeys')
+    known_keys = common.config.get('apk_signing_key_block_list', [])
+    if keys:
+        if known_keys:
+            for key in keys:
+                if key in known_keys:
+                    yield _('Known debug key is used in AllowedAPKSigningKeys: ') + key
         return
     if app.get('Binaries') is not None:
         yield _(
diff --git a/tests/lint.TestCase b/tests/lint.TestCase
index 55c314b0..e8e1efba 100755
--- a/tests/lint.TestCase
+++ b/tests/lint.TestCase
@@ -438,6 +438,25 @@ class LintTest(unittest.TestCase):
         with self.assertRaises(TypeError):
             fdroidserver.lint.lint_config('mirrors.yml')
 
+    def test_lint_known_debug_keys(self):
+        config = dict()
+        fdroidserver.common.fill_config_defaults(config)
+        config['apk_signing_key_block_list'] = [
+            'a40da80a59d170caa950cf15c18c454d47a39b26989d8b640ecd745ba71bf5dc'
+        ]
+        fdroidserver.common.config = config
+        fdroidserver.lint.config = config
+
+        app = fdroidserver.metadata.App()
+        app.AllowedAPKSigningKeys = [
+            'a40da80a59d170caa950cf15c18c454d47a39b26989d8b640ecd745ba71bf5dc'
+        ]
+
+        for warn in fdroidserver.lint.check_certificate_pinned_binaries(app):
+            anywarns = True
+            logging.debug(warn)
+        self.assertTrue(anywarns)
+
 
 class LintAntiFeaturesTest(unittest.TestCase):
     def setUp(self):