diff --git a/src/test/app/MPToken_test.cpp b/src/test/app/MPToken_test.cpp
index 9fdad6a0743..0f92212288d 100644
--- a/src/test/app/MPToken_test.cpp
+++ b/src/test/app/MPToken_test.cpp
@@ -24,6 +24,7 @@
 #include <xrpl/protocol/jss.h>
 
 namespace ripple {
+namespace test {
 
 class MPToken_test : public beast::unit_test::suite
 {
@@ -1989,4 +1990,5 @@ class MPToken_test : public beast::unit_test::suite
 
 BEAST_DEFINE_TESTSUITE_PRIO(MPToken, tx, ripple, 2);
 
+}  // namespace test
 }  // namespace ripple