diff --git a/src/tests/CMakeLists.txt b/src/tests/CMakeLists.txt
index eea78435adbedd5baf35f2a988155181fe7781ad..6c431597c1093c7d4004a7b4a426c9d7195743fc 100644
--- a/src/tests/CMakeLists.txt
+++ b/src/tests/CMakeLists.txt
@@ -54,6 +54,11 @@ add_executable(DESolver_test DESolver_test.cpp)
 target_link_libraries(DESolver_test lib4neuro boost_unit_test)
 target_include_directories(DESolver_test PRIVATE ${Boost_INCLUDE_DIRS} ${TURTLE_INCLUDE_DIR})
 
+add_executable(GradientDescent_test GradientDescent_test.cpp)
+target_link_libraries(GradientDescent_test lib4neuro boost_unit_test)
+target_include_directories(GradientDescent_test PRIVATE ${Boost_INCLUDE_DIRS} ${TURTLE_INCLUDE_DIR})
+
+
 set_target_properties(
     linear_neuron_test
     constant_neuron_test
@@ -68,6 +73,8 @@ set_target_properties(
     NeuralNetworkSum_test
     errorfunction_test
     DESolver_test
+    GradientDescent_test
+
 
     PROPERTIES
         ARCHIVE_OUTPUT_DIRECTORY "${PROJECT_BINARY_DIR}/lib"
diff --git a/src/tests/DESolver_test.cpp b/src/tests/DESolver_test.cpp
index de20352fd55f06b3b91621a4e55dcd45f8269967..62321d17dc6e22b6041369d14b44119edfe1d919 100644
--- a/src/tests/DESolver_test.cpp
+++ b/src/tests/DESolver_test.cpp
@@ -118,25 +118,25 @@ BOOST_AUTO_TEST_SUITE(DESolver_test)
     }
 
     BOOST_AUTO_TEST_CASE(DESolver_add_eq_test){
-  //      DESolver *deSolver = new DESolver(1,1,1);
-  //      MultiIndex *multiIndex = new MultiIndex(2);
-  //      multiIndex->set_partial_derivative(0,1);
-  //      multiIndex->set_partial_derivative(1,0.5);
-
-		//deSolver->add_to_differential_equation(0, *multiIndex, "0.5" );
-		//
-  //      std::vector<double> inp, out;
-  //      std::vector<std::pair<std::vector<double>, std::vector<double>>> data_vec_dy;
-  //      inp = {0.0};
-  //      out = {8.0};
-  //      data_vec_dy.emplace_back(std::make_pair(inp, out));
-  //      DataSet ds_02(&data_vec_dy);
-
-  //      deSolver->set_error_function( 0, ErrorFunctionType::ErrorFuncMSE, &ds_02 );
-
-  //      std::vector<double> weights;
-  //      weights.push_back(1.0);
-  //      BOOST_CHECK_EQUAL(64,deSolver->eval_total_error(weights));
+        DESolver *deSolver = new DESolver(1,1,1);
+        MultiIndex *multiIndex = new MultiIndex(2);
+        multiIndex->set_partial_derivative(0,1);
+        multiIndex->set_partial_derivative(1,0.5);
+
+		deSolver->add_to_differential_equation(0, *multiIndex, "0.5" );
+		
+        std::vector<double> inp, out;
+        std::vector<std::pair<std::vector<double>, std::vector<double>>> data_vec_dy;
+        inp = {0.0};
+        out = {8.0};
+        data_vec_dy.emplace_back(std::make_pair(inp, out));
+        DataSet ds_02(&data_vec_dy);
+
+        deSolver->set_error_function( 0, ErrorFunctionType::ErrorFuncMSE, &ds_02 );
+
+        std::vector<double> weights;
+        weights.push_back(1.0);
+        BOOST_CHECK_EQUAL(64,deSolver->eval_total_error(weights));
     }
 	
 BOOST_AUTO_TEST_SUITE_END()