diff --git a/gtsam_unstable/geometry/tests/testSimilarity3.cpp b/gtsam/geometry/tests/testSimilarity3.cpp
similarity index 99%
rename from gtsam_unstable/geometry/tests/testSimilarity3.cpp
rename to gtsam/geometry/tests/testSimilarity3.cpp
index 937761f02..abfab9451 100644
--- a/gtsam_unstable/geometry/tests/testSimilarity3.cpp
+++ b/gtsam/geometry/tests/testSimilarity3.cpp
@@ -16,7 +16,7 @@
  * @author Zhaoyang Lv
  */
 
-#include <gtsam_unstable/geometry/Similarity3.h>
+#include <gtsam/geometry/Similarity3.h>
 #include <gtsam/slam/BetweenFactor.h>
 #include <gtsam/nonlinear/NonlinearFactorGraph.h>
 #include <gtsam/nonlinear/ExpressionFactorGraph.h>