diff --git a/test/runtests.sh b/test/runtests.sh
index ee9ee850a4..d62b318009 100755
--- a/test/runtests.sh
+++ b/test/runtests.sh
@@ -76,6 +76,7 @@ mkdir "$PROFILE/zotero"
 cat <<EOF > "$PROFILE/prefs.js"
 user_pref("extensions.autoDisableScopes", 0);
 user_pref("extensions.zotero.debug.log", $DEBUG);
+user_pref("extensions.zotero.debug.time", $DEBUG);
 user_pref("extensions.zotero.firstRunGuidance", false);
 user_pref("extensions.zotero.firstRun2", false);
 EOF