diff --git a/tests/testGradientDescentOptimizer.cpp b/gtsam/nonlinear/tests/testNonlinearConjugateGradientOptimizer.cpp
similarity index 100%
rename from tests/testGradientDescentOptimizer.cpp
rename to gtsam/nonlinear/tests/testNonlinearConjugateGradientOptimizer.cpp