diff -ur b/t/lib-httpd/apache.conf a/t/lib-httpd/apache.conf
--- b/t/lib-httpd/apache.conf	2024-01-09 11:06:46.660868023 +0100
+++ a/t/lib-httpd/apache.conf	2024-01-09 11:09:09.572713625 +0100
@@ -272,7 +272,9 @@
 <IfDefine DAV>
 	LoadModule dav_module modules/mod_dav.so
 	LoadModule dav_fs_module modules/mod_dav_fs.so
-
+	<IfDirective DavLockDBType>
+   		DavLockDBType sdbm
+	</IfDirective>
 	DAVLockDB DAVLock
 	<Location /dumb/>
 		Dav on