diff --git a/internal/ceres/tiny_solver_autodiff_function_test.cc b/internal/ceres/tiny_solver_autodiff_function_test.cc
index de4f9535c..7b54c0f8a 100644
--- a/internal/ceres/tiny_solver_autodiff_function_test.cc
+++ b/internal/ceres/tiny_solver_autodiff_function_test.cc
@@ -95,4 +95,5 @@ TEST(TinySolverAutoDiffFunction, SimpleFunction) {
   EXPECT_NEAR(4.0, jacobian(1, 1), kTolerance);
   EXPECT_NEAR(6.0, jacobian(1, 2), kTolerance);
 }
-}  // namespace tinysolver
+
+}  // namespace ceres
diff --git a/internal/ceres/tiny_solver_test.cc b/internal/ceres/tiny_solver_test.cc
index f92b186fa..df0101fdb 100644
--- a/internal/ceres/tiny_solver_test.cc
+++ b/internal/ceres/tiny_solver_test.cc
@@ -192,4 +192,4 @@ TEST(TinySolver, ParametersAndResidualsDynamic) {
   TestHelper(f, x0);
 }
 
-}  // namespace tinysolver
+}  // namespace ceres