diff --git a/tests/gc-external-daemon/common.sh b/tests/gc-external-daemon/common.sh
index 746de5c1a..2bff94788 100644
--- a/tests/gc-external-daemon/common.sh
+++ b/tests/gc-external-daemon/common.sh
@@ -1,6 +1,6 @@
 source ../common.sh
 
 enableFeatures "external-gc-daemon"
-echo "gc-socket-path = $NIX_GC_SOCKET_PATH" >> "$NIX_CONF_DIR"/nix.cong
+echo "gc-socket-path = $NIX_GC_SOCKET_PATH" >> "$NIX_CONF_DIR"/nix.conf
 
 startGcDaemon