diff --git a/dev-libs/mongo-c-driver/mongo-c-driver-1.27.2.ebuild b/dev-libs/mongo-c-driver/mongo-c-driver-1.27.2.ebuild
index 0e5de3d..f79a39c 100644
--- a/dev-libs/mongo-c-driver/mongo-c-driver-1.27.2.ebuild
+++ b/dev-libs/mongo-c-driver/mongo-c-driver-1.27.2.ebuild
@@ -90,9 +90,11 @@ src_configure() {
 # FEATURES="test -network-sandbox" USE="static-libs" emerge dev-libs/mongo-c-driver
 src_test() {
 	local PORT=27099
-	mongod --setParameter enableTestCommands=1 --enableMajorityReadConcern \
-		--port ${PORT} --bind_ip 127.0.0.1 --nounixsocket --fork \
-		--dbpath="${T}" --logpath="${T}/mongod.log" || die
+	LC_ALL=C \
+		mongod --setParameter enableTestCommands=1 \
+		--enableMajorityReadConcern --port ${PORT} \
+		--bind_ip 127.0.0.1 --nounixsocket --fork --dbpath="${T}" \
+		--logpath="${T}/mongod.log" || die
 	MONGOC_TEST_URI="mongodb://[127.0.0.1]:${PORT}" \
 		MONGOC_ENABLE_MAJORITY_READ_CONCERN=on \
 		../mongo-c-driver-${PV}_build/src/libmongoc/test-libmongoc \