diff --git a/src/AnimGraph/AnimGraph.cc b/src/AnimGraph/AnimGraph.cc
index 0fc8ed7..5ad52af 100644
--- a/src/AnimGraph/AnimGraph.cc
+++ b/src/AnimGraph/AnimGraph.cc
@@ -223,6 +223,8 @@ void AnimGraph::evaluate() {
 
     finishNodeEval(node->m_index);
   }
+
+  evalOutputNode();
 }
 
 Socket* AnimGraph::getInputSocket(const std::string& name) {
diff --git a/tests/AnimGraphResourceTests.cc b/tests/AnimGraphResourceTests.cc
index 82a82f8..8d8e19a 100644
--- a/tests/AnimGraphResourceTests.cc
+++ b/tests/AnimGraphResourceTests.cc
@@ -150,8 +150,8 @@ TEST_CASE("ResourceSaveLoadMathGraphInputs", "[AnimGraphResource]") {
   graph_resource_origin.clear();
   graph_resource_origin.m_name = "TestInputOutputGraph";
 
-  size_t float_to_vec3_node_index =
-      graph_resource_origin.addNode(AnimNodeResourceFactory("MathFloatToVec3Node"));
+  size_t float_to_vec3_node_index = graph_resource_origin.addNode(
+      AnimNodeResourceFactory("MathFloatToVec3Node"));
 
   AnimNodeResource& graph_output_node =
       graph_resource_origin.getGraphOutputNode();
@@ -200,7 +200,6 @@ TEST_CASE("ResourceSaveLoadMathGraphInputs", "[AnimGraphResource]") {
       graph_output_node,
       "GraphVec3Output"));
 
-
   WHEN("Saving and loading graph resource") {
     const char* filename = "ResourceSaveLoadGraphInputs.json";
     graph_resource_origin.saveToFile(filename);
@@ -240,25 +239,170 @@ TEST_CASE("ResourceSaveLoadMathGraphInputs", "[AnimGraphResource]") {
         AnimGraph anim_graph = graph_resource_loaded.createInstance();
 
         REQUIRE(anim_graph.getInputSocket("GraphFloatInput") != nullptr);
-        REQUIRE(anim_graph.getInputPtr("GraphFloatInput") == anim_graph.m_input_buffer);
+        REQUIRE(
+            anim_graph.getInputPtr("GraphFloatInput")
+            == anim_graph.m_input_buffer);
 
         float* graph_float_input = nullptr;
-        graph_float_input = static_cast<float*>(anim_graph.getInputPtr("GraphFloatInput"));
+        graph_float_input =
+            static_cast<float*>(anim_graph.getInputPtr("GraphFloatInput"));
 
         *graph_float_input = 123.456f;
 
+        AND_WHEN("Evaluating Graph") {
+          anim_graph.updateTime(0.f);
+          anim_graph.evaluate();
+
+          Socket* float_output_socket =
+              anim_graph.getOutputSocket("GraphFloatOutput");
+          Socket* vec3_output_socket =
+              anim_graph.getOutputSocket("GraphVec3Output");
+          Vec3& vec3_output =
+              *static_cast<Vec3*>(vec3_output_socket->m_value.ptr);
+
+          THEN("output vector components equal the graph input vaulues") {
+            CHECK(vec3_output[0] == *graph_float_input);
+            CHECK(vec3_output[1] == *graph_float_input);
+            CHECK(vec3_output[2] == *graph_float_input);
+          }
+        }
+      }
+    }
+  }
+}
+
+TEST_CASE("SimpleMathEvaluations", "[AnimGraphResource]") {
+  AnimGraphResource graph_resource_origin;
+
+  graph_resource_origin.clear();
+  graph_resource_origin.m_name = "TestInputOutputGraph";
+
+  size_t math_add0_node_index =
+      graph_resource_origin.addNode(AnimNodeResourceFactory("MathAddNode"));
+
+  size_t math_add1_node_index =
+      graph_resource_origin.addNode(AnimNodeResourceFactory("MathAddNode"));
+
+  AnimNodeResource& graph_output_node =
+      graph_resource_origin.getGraphOutputNode();
+
+  graph_output_node.m_socket_accessor->RegisterInput<float>(
+      "GraphFloat0Output",
+      nullptr);
+  graph_output_node.m_socket_accessor->RegisterInput<float>(
+      "GraphFloat1Output",
+      nullptr);
+  graph_output_node.m_socket_accessor->RegisterInput<float>(
+      "GraphFloat2Output",
+      nullptr);
+
+  AnimNodeResource& graph_input_node =
+      graph_resource_origin.getGraphInputNode();
+  graph_input_node.m_socket_accessor->RegisterOutput<float>(
+      "GraphFloatInput",
+      nullptr);
+
+  // Prepare graph inputs and outputs
+  AnimNodeResource& math_add0_node =
+      graph_resource_origin.m_nodes[math_add0_node_index];
+  AnimNodeResource& math_add1_node =
+      graph_resource_origin.m_nodes[math_add1_node_index];
+
+  // direct output
+  REQUIRE(graph_resource_origin.connectSockets(
+      graph_input_node,
+      "GraphFloatInput",
+      graph_output_node,
+      "GraphFloat0Output"));
+
+  // add0 node
+  REQUIRE(graph_resource_origin.connectSockets(
+      graph_input_node,
+      "GraphFloatInput",
+      math_add0_node,
+      "Input0"));
+
+  REQUIRE(graph_resource_origin.connectSockets(
+      graph_input_node,
+      "GraphFloatInput",
+      math_add0_node,
+      "Input1"));
+
+  REQUIRE(graph_resource_origin.connectSockets(
+      math_add0_node,
+      "Output",
+      graph_output_node,
+      "GraphFloat1Output"));
+
+  // add1 node
+  REQUIRE(graph_resource_origin.connectSockets(
+      math_add0_node,
+      "Output",
+      math_add1_node,
+      "Input0"));
+
+  REQUIRE(graph_resource_origin.connectSockets(
+      graph_input_node,
+      "GraphFloatInput",
+      math_add1_node,
+      "Input1"));
+
+  REQUIRE(graph_resource_origin.connectSockets(
+      math_add1_node,
+      "Output",
+      graph_output_node,
+      "GraphFloat2Output"));
+
+  WHEN("Saving and loading graph resource") {
+    const char* filename = "ResourceSaveLoadGraphInputs.json";
+    graph_resource_origin.saveToFile(filename);
+
+    AnimGraphResource graph_resource_loaded;
+    graph_resource_loaded.loadFromFile(filename);
+
+    const AnimNodeResource& graph_loaded_output_node =
+        graph_resource_loaded.m_nodes[0];
+    const AnimNodeResource& graph_loaded_input_node =
+        graph_resource_loaded.m_nodes[1];
+
+    WHEN("Instantiating an AnimGraph") {
+      AnimGraph anim_graph = graph_resource_loaded.createInstance();
+
+      REQUIRE(anim_graph.getInputSocket("GraphFloatInput") != nullptr);
+      REQUIRE(
+          anim_graph.getInputPtr("GraphFloatInput")
+          == anim_graph.m_input_buffer);
+
+      float* graph_float_input = nullptr;
+      graph_float_input =
+          static_cast<float*>(anim_graph.getInputPtr("GraphFloatInput"));
+
+      *graph_float_input = 123.456f;
+
+      AND_WHEN("Evaluating Graph") {
         anim_graph.updateTime(0.f);
         anim_graph.evaluate();
 
-        anim_graph.evalOutputNode();
+        Socket* float0_output_socket =
+            anim_graph.getOutputSocket("GraphFloat0Output");
+        Socket* float1_output_socket =
+            anim_graph.getOutputSocket("GraphFloat1Output");
+        Socket* float2_output_socket =
+            anim_graph.getOutputSocket("GraphFloat2Output");
 
-        Socket* float_output_socket = anim_graph.getOutputSocket("GraphFloatOutput");
-        Socket* vec3_output_socket = anim_graph.getOutputSocket("GraphVec3Output");
-        Vec3& vec3_output = *static_cast<Vec3*>(vec3_output_socket->m_value.ptr);
+        REQUIRE(float0_output_socket != nullptr);
+        REQUIRE(float1_output_socket != nullptr);
+        REQUIRE(float2_output_socket != nullptr);
 
-        CHECK(vec3_output[0] == *graph_float_input);
-        CHECK(vec3_output[1] == *graph_float_input);
-        CHECK(vec3_output[2] == *graph_float_input);
+        float& float0_output = *static_cast<float*>(float0_output_socket->m_value.ptr);
+        float& float1_output = *static_cast<float*>(float1_output_socket->m_value.ptr);
+        float& float2_output = *static_cast<float*>(float2_output_socket->m_value.ptr);
+
+        THEN("output vector components equal the graph input vaulues") {
+          CHECK(float0_output == Approx(*graph_float_input));
+          CHECK(float1_output == Approx(*graph_float_input * 2.));
+          CHECK(float2_output == Approx(*graph_float_input * 3.));
+        }
       }
     }
   }