diff --git a/fdroidserver/common.py b/fdroidserver/common.py
index 13aaebb0..49323357 100644
--- a/fdroidserver/common.py
+++ b/fdroidserver/common.py
@@ -361,6 +361,26 @@ def regsub_file(pattern, repl, path):
         f.write(text)
 
 
+def config_type_check(path, data):
+    if Path(path).name == 'mirrors.yml':
+        expected_type = list
+    else:
+        expected_type = dict
+    if expected_type == dict:
+        if not isinstance(data, dict):
+            msg = _('{path} is not "key: value" dict, but a {datatype}!')
+            raise TypeError(msg.format(path=path, datatype=type(data).__name__))
+    elif not isinstance(data, expected_type):
+        msg = _('{path} is not {expected_type}, but a {datatype}!')
+        raise TypeError(
+            msg.format(
+                path=path,
+                expected_type=expected_type.__name__,
+                datatype=type(data).__name__,
+            )
+        )
+
+
 def read_config(opts=None):
     """Read the repository config.
 
@@ -401,11 +421,7 @@ def read_config(opts=None):
             config = yaml.safe_load(fp)
         if not config:
             config = {}
-        if not isinstance(config, dict):
-            msg = _('{path} is not "key: value" dict, but a {datatype}!')
-            raise TypeError(
-                msg.format(path=config_file, datatype=type(config).__name__)
-            )
+        config_type_check(config_file, config)
     elif os.path.exists(old_config_file):
         logging.warning(_("""{oldfile} is deprecated, use {newfile}""")
                         .format(oldfile=old_config_file, newfile=config_file))
diff --git a/fdroidserver/lint.py b/fdroidserver/lint.py
index 0fb97d9c..04b03b25 100644
--- a/fdroidserver/lint.py
+++ b/fdroidserver/lint.py
@@ -20,6 +20,7 @@ from argparse import ArgumentParser
 import re
 import sys
 import platform
+import ruamel.yaml
 import urllib.parse
 from pathlib import Path
 
@@ -739,6 +740,21 @@ def check_certificate_pinned_binaries(app):
             return
 
 
+def lint_config(arg):
+    path = Path(arg)
+    passed = True
+    yamllintresult = common.run_yamllint(path)
+    if yamllintresult:
+        print(yamllintresult)
+        passed = False
+
+    with path.open() as fp:
+        data = ruamel.yaml.YAML(typ='safe').load(fp)
+    common.config_type_check(arg, data)
+
+    return passed
+
+
 def main():
     global config, options
 
@@ -777,6 +793,33 @@ def main():
 
         yamllint  # make pyflakes ignore this
 
+    paths = list()
+    for arg in options.appid:
+        if (
+            arg == 'config.yml'
+            or Path(arg).parent.name == 'config'
+            or Path(arg).parent.parent.name == 'config'  # localized
+        ):
+            paths.append(arg)
+
+    failed = 0
+    if paths:
+        for path in paths:
+            options.appid.remove(path)
+            if not lint_config(path):
+                failed += 1
+        # an empty list of appids means check all apps, avoid that if files were given
+        if not options.appid:
+            sys.exit(failed)
+
+    if not lint_metadata(options):
+        failed += 1
+
+    if failed:
+        sys.exit(failed)
+
+
+def lint_metadata(options):
     # Get all apps...
     allapps = metadata.read_metadata(options.appid)
     apps = common.read_app_args(options.appid, allapps, False)
@@ -856,8 +899,7 @@ def main():
                 anywarns = True
                 print("%s: %s" % (appid, warn))
 
-    if anywarns:
-        sys.exit(1)
+    return not anywarns
 
 
 # A compiled, public domain list of official SPDX license tags.  generated
diff --git a/tests/common.TestCase b/tests/common.TestCase
index 8a7ec438..4d9ce009 100755
--- a/tests/common.TestCase
+++ b/tests/common.TestCase
@@ -2838,6 +2838,36 @@ class CommonTest(unittest.TestCase):
         with self.assertRaises(TypeError):
             fdroidserver.common.load_localized_config(CATEGORIES_CONFIG_NAME, 'repo')
 
+    def test_config_type_check_config_yml_dict(self):
+        fdroidserver.common.config_type_check('config.yml', dict())
+
+    def test_config_type_check_config_yml_list(self):
+        with self.assertRaises(TypeError):
+            fdroidserver.common.config_type_check('config.yml', list())
+
+    def test_config_type_check_config_yml_set(self):
+        with self.assertRaises(TypeError):
+            fdroidserver.common.config_type_check('config.yml', set())
+
+    def test_config_type_check_config_yml_str(self):
+        with self.assertRaises(TypeError):
+            fdroidserver.common.config_type_check('config.yml', str())
+
+    def test_config_type_check_mirrors_list(self):
+        fdroidserver.common.config_type_check('config/mirrors.yml', list())
+
+    def test_config_type_check_mirrors_dict(self):
+        with self.assertRaises(TypeError):
+            fdroidserver.common.config_type_check('config/mirrors.yml', dict())
+
+    def test_config_type_check_mirrors_set(self):
+        with self.assertRaises(TypeError):
+            fdroidserver.common.config_type_check('config/mirrors.yml', set())
+
+    def test_config_type_check_mirrors_str(self):
+        with self.assertRaises(TypeError):
+            fdroidserver.common.config_type_check('config/mirrors.yml', str())
+
 
 if __name__ == "__main__":
     os.chdir(os.path.dirname(__file__))