diff --git a/integral_image_tests.cpp b/integral_image_tests.cpp
index 3afc99d..d820b40 100644
--- a/integral_image_tests.cpp
+++ b/integral_image_tests.cpp
@@ -12,10 +12,35 @@ bool are_equal(const integral_image::Mat &lhv, const integral_image::Mat &rhv)
     return cv::countNonZero(diff) == 0;
 }
 
+
+double spec_input_values[] = {0, 1, 2, 3, 4, 5};
+double spec_expected_output_values[] = {0., 1., 2., 6., 6., 15.};
+
+const integral_image::Mat spec_input(3, 2, spec_input_values);
+const integral_image::Mat spec_expected_output(3, 2, spec_expected_output_values);
+
 }
 
 
-TEST_CASE("Integral image of an empty Mat is an empty Mat")
+TEST_CASE("integral_image_serial can work with empty Mat", "[integral_image]")
+{
+    using namespace integral_image;
+
+    Mat  input;
+    auto output = integral_image_serial(input);
+
+    REQUIRE(output.data == NULL);
+}
+
+TEST_CASE("integral_image_serial correctly processes the example from the specification", "[integral_image]")
+{
+    using namespace integral_image;
+
+    auto output = integral_image_serial(spec_input);
+    REQUIRE(are_equal(spec_expected_output, output));
+}
+
+TEST_CASE("integral_image_openmp can work with empty Mat", "[integral_image]")
 {
     using namespace integral_image;
 
@@ -25,25 +50,10 @@ TEST_CASE("Integral image of an empty Mat is an empty Mat")
     REQUIRE(output.data == NULL);
 }
 
-TEST_CASE("Integral image of a zero-valued Mat is the same sized zero-valued Mat")
+TEST_CASE("integral_image_openmp correctly processes the example from the specification", "[integral_image]")
 {
     using namespace integral_image;
 
-    Mat input   = Mat::zeros(20, 18);
-    auto output = integral_image_openmp(input);
-    REQUIRE(are_equal(input, output));
-}
-
-TEST_CASE("")
-{
-    using namespace integral_image;
-
-    double input_values[] = {0, 1, 2, 3, 4, 5};
-    double expected_output_values[] = {0., 1., 2., 6., 6., 15.};
-
-    Mat input(3, 2, input_values);
-    Mat expected_output(3, 2, expected_output_values);
-
-    auto output = integral_image_openmp(input);
-    REQUIRE(are_equal(expected_output, output));
+    auto output = integral_image_openmp(spec_input);
+    REQUIRE(are_equal(spec_expected_output, output));
 }