diff --git a/gtsam/slam/BiasedGPSFactor.h b/gtsam_unstable/slam/BiasedGPSFactor.h
similarity index 100%
rename from gtsam/slam/BiasedGPSFactor.h
rename to gtsam_unstable/slam/BiasedGPSFactor.h
diff --git a/gtsam/slam/GaussMarkov1stOrderFactor.h b/gtsam_unstable/slam/GaussMarkov1stOrderFactor.h
similarity index 100%
rename from gtsam/slam/GaussMarkov1stOrderFactor.h
rename to gtsam_unstable/slam/GaussMarkov1stOrderFactor.h
diff --git a/gtsam/slam/tests/testBiasedGPSFactor.cpp b/gtsam_unstable/slam/tests/testBiasedGPSFactor.cpp
similarity index 98%
rename from gtsam/slam/tests/testBiasedGPSFactor.cpp
rename to gtsam_unstable/slam/tests/testBiasedGPSFactor.cpp
index d907852c5..38e8a1466 100644
--- a/gtsam/slam/tests/testBiasedGPSFactor.cpp
+++ b/gtsam_unstable/slam/tests/testBiasedGPSFactor.cpp
@@ -8,7 +8,7 @@
 #include <gtsam/base/numericalDerivative.h>
 #include <gtsam/geometry/Pose3.h>
 #include <gtsam/inference/Symbol.h>
-#include <gtsam/slam/BiasedGPSFactor.h>
+#include <gtsam_unstable/slam/BiasedGPSFactor.h>
 #include <CppUnitLite/TestHarness.h>
 
 using namespace gtsam;
diff --git a/gtsam/slam/tests/testGaussMarkov1stOrderFactor.cpp b/gtsam_unstable/slam/tests/testGaussMarkov1stOrderFactor.cpp
similarity index 98%
rename from gtsam/slam/tests/testGaussMarkov1stOrderFactor.cpp
rename to gtsam_unstable/slam/tests/testGaussMarkov1stOrderFactor.cpp
index d5a3ed8f7..c708c1949 100644
--- a/gtsam/slam/tests/testGaussMarkov1stOrderFactor.cpp
+++ b/gtsam_unstable/slam/tests/testGaussMarkov1stOrderFactor.cpp
@@ -17,7 +17,7 @@
  */
 
 #include <CppUnitLite/TestHarness.h>
-#include <gtsam/slam/GaussMarkov1stOrderFactor.h>
+#include <gtsam_unstable/slam/GaussMarkov1stOrderFactor.h>
 #include <gtsam/nonlinear/Values.h>
 #include <gtsam/inference/Key.h>
 #include <gtsam/base/numericalDerivative.h>