diff --git a/gtsam/geometry/tests/testUnit3.cpp b/gtsam/geometry/tests/testUnit3.cpp
index 0f98e4648..ddf60a256 100644
--- a/gtsam/geometry/tests/testUnit3.cpp
+++ b/gtsam/geometry/tests/testUnit3.cpp
@@ -484,7 +484,7 @@ TEST(Unit3, ErrorBetweenFactor) {
   }
 }
 
-TEST(Unit3, copy_assign) {
+TEST(Unit3, CopyAssign) {
   Unit3 p{1, 0.2, 0.3};
 
   EXPECT(p.error(p).isZero());