diff --git a/Image/ImageUtils.h b/Image/ImageUtils.h
index 9d0ed53..d32c210 100644
--- a/Image/ImageUtils.h
+++ b/Image/ImageUtils.h
@@ -1,8 +1,6 @@
 /**
  * Karaka
  *
- * PHP Version 8.0
- *
  * @package   Image
  * @copyright Dennis Eichhorn
  * @license   OMS License 1.0
diff --git a/Image/Skew.h b/Image/Skew.h
index 4030e8e..d293670 100644
--- a/Image/Skew.h
+++ b/Image/Skew.h
@@ -1,8 +1,6 @@
 /**
  * Karaka
  *
- * PHP Version 8.0
- *
  * @package   Image
  * @copyright Dennis Eichhorn
  * @license   OMS License 1.0
diff --git a/Image/Thresholding.h b/Image/Thresholding.h
index 1ad9ced..ae704c7 100644
--- a/Image/Thresholding.h
+++ b/Image/Thresholding.h
@@ -1,8 +1,6 @@
 /**
  * Karaka
  *
- * PHP Version 8.0
- *
  * @package   Image
  * @copyright Dennis Eichhorn
  * @license   OMS License 1.0
diff --git a/Tools/InvoicePreprocessing/main.cpp b/Tools/InvoicePreprocessing/main.cpp
index 5e7f501..ec5ff37 100644
--- a/Tools/InvoicePreprocessing/main.cpp
+++ b/Tools/InvoicePreprocessing/main.cpp
@@ -1,8 +1,6 @@
 /**
  * Karaka
  *
- * PHP Version 8.0
- *
  * @package   App
  * @copyright Dennis Eichhorn
  * @license   OMS License 1.0
@@ -15,7 +13,7 @@
 #include "../../Image/Skew.h"
 #include "../../Image/Thresholding.h"
 
-int main(int argc, char** argv )
+int main(int argc, char** argv)
 {
     if (argc != 3) {
         printf("A input image and a output image is required\n");
diff --git a/Utils/TestUtils.h b/Utils/TestUtils.h
new file mode 100644
index 0000000..7739b29
--- /dev/null
+++ b/Utils/TestUtils.h
@@ -0,0 +1,28 @@
+/**
+ * Karaka
+ *
+ * @package   Utils
+ * @copyright Dennis Eichhorn
+ * @license   OMS License 1.0
+ * @version   1.0.0
+ * @link      https://karaka.app
+ */
+#ifndef UTILS_TEST_UTILS_H
+#define UTILS_TEST_UTILS_H
+
+#include <stdio.h>
+#include <math.h>
+
+#define ASSERT_EQUALS(a, b, t1, t2) \
+    ({ __typeof__ (a) _a = (a); \
+        __typeof__ (b) _b = (b); \
+        if (_a == _b) { printf("."); } else { printf("F"); printf("\n\n%s - %i: ", __FILE__, __LINE__); printf(t1, a); printf(" != "); printf(t2, b); return 0; } \
+    })
+
+#define ASSERT_EQUALS__DELTA(a, b, delta, t1, t2) \
+    ({ __typeof__ (a) _a = (a); \
+        __typeof__ (b) _b = (b); \
+        if (abs(_a - _b) <= delta) { printf("."); } else { printf("F"); printf("\n\n%s - %i: ", __FILE__, __LINE__); printf(t1, a); printf(" != "); printf(t2, b); printf("\n"); return 0; } \
+    })
+
+#endif
\ No newline at end of file
diff --git a/tests/Image/ImageUtilsTest.cpp b/tests/Image/ImageUtilsTest.cpp
new file mode 100644
index 0000000..09dcf56
--- /dev/null
+++ b/tests/Image/ImageUtilsTest.cpp
@@ -0,0 +1,33 @@
+/**
+ * Karaka
+ *
+ * @package   Test
+ * @copyright Dennis Eichhorn
+ * @license   OMS License 1.0
+ * @version   1.0.0
+ * @link      https://karaka.app
+ */
+#include <stdio.h>
+
+#include "../../Utils/TestUtils.h"
+#include "../../Image/ImageUtils.h"
+
+int main(int argc, char** argv)
+{
+    printf("ImageUtils:\n\n");
+
+    printf("lightnessFromRgb:\n");
+
+    float white = Image::ImageUtils::lightnessFromRgb(255, 255, 255);
+    ASSERT_EQUALS(white, 1.0, "%f", "%f");
+
+    float black = Image::ImageUtils::lightnessFromRgb(0, 0, 0);
+    ASSERT_EQUALS(black, 0.0, "%f", "%f");
+
+    float other = Image::ImageUtils::lightnessFromRgb(125, 125, 125);
+    ASSERT_EQUALS__DELTA(other, 0.524, 0.00001, "%f", "%f");
+
+    printf("\n");
+
+    return 0;
+}
\ No newline at end of file
diff --git a/tests/test.sh b/tests/test.sh
new file mode 100755
index 0000000..974ca29
--- /dev/null
+++ b/tests/test.sh
@@ -0,0 +1,3 @@
+#!/bin/bash
+
+g++ Image/ImageUtilsTest.cpp -o Image/ImageUtilsTest && ./Image/ImageUtilsTest && rm Image/ImageUtilsTest
\ No newline at end of file