diff --git a/pyproject.toml b/pyproject.toml
index 314b9ce5..294438ad 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -28,3 +28,8 @@ addopts = """
 
 [tool.mypy]
 ignore_missing_imports = true
+
+[tool.coverage.report]
+exclude_lines = [
+    "if TYPE_CHECKING:",
+]
diff --git a/vdirsyncer/storage/dav.py b/vdirsyncer/storage/dav.py
index eece4ee4..f3554af1 100644
--- a/vdirsyncer/storage/dav.py
+++ b/vdirsyncer/storage/dav.py
@@ -390,6 +390,7 @@ def __init__(
         ssl = prepare_verify(verify, verify_fingerprint)
         if ssl:
             self._settings["ssl"] = ssl
+            ssl.load_cert_chain(*self._settings["cert"])
 
         self.useragent = useragent
         self.url = url.rstrip("/") + "/"