diff --git a/fdroidserver/scanner.py b/fdroidserver/scanner.py
index 96b6a1e2..9aa16bb7 100644
--- a/fdroidserver/scanner.py
+++ b/fdroidserver/scanner.py
@@ -1290,7 +1290,7 @@ def main():
                     )
                     continue
 
-                logging.info("...scanning versionCode " + build.versionCode)
+                logging.info(f"...scanning versionCode {build.versionCode}")
                 # Prepare the source code...
                 common.prepare_source(
                     vcs, app, build, build_dir, srclib_dir, extlib_dir, False
diff --git a/tests/test_scanner.py b/tests/test_scanner.py
index 00595bb1..96f477ac 100755
--- a/tests/test_scanner.py
+++ b/tests/test_scanner.py
@@ -81,6 +81,31 @@ class ScannerTest(SetUpTearDownMixin, unittest.TestCase):
         super().setUp()
         fdroidserver.scanner.ScannerTool.refresh_allowed = False
 
+    def test_looping_through_builds(self):
+        """Exercises some of main() to get some coverage."""
+        appid = "com.example"
+        with (
+            tempfile.TemporaryDirectory() as tmpdir,
+            TmpCwd(tmpdir),
+            mock.patch("sys.argv", ["fdroid scanner", appid]),
+            mock.patch(
+                "fdroidserver.common.prepare_source", lambda v, a, b, d, s, e, r: None
+            ),
+        ):
+            os.mkdir("metadata")
+            pathlib.Path(f"metadata/{appid}.yml").write_text(
+                textwrap.dedent(
+                    """
+                    RepoType: git
+                    Builds:
+                      - versionCode: 1
+                        commit: v1.0
+                    """
+                )
+            )
+            fdroidserver.scanner.main()
+            self.assertTrue(os.path.exists("build"))
+
     def test_scan_source_files(self):
         fdroidserver.common.options = mock.Mock()
         fdroidserver.common.options.json = False