diff --git a/I2_NeuronalerAbsturz/Start_Mac/imageInputTests.c b/I2_NeuronalerAbsturz/Start_Mac/imageInputTests.c
index d44f35a..268910f 100644
--- a/I2_NeuronalerAbsturz/Start_Mac/imageInputTests.c
+++ b/I2_NeuronalerAbsturz/Start_Mac/imageInputTests.c
@@ -6,7 +6,7 @@
 #include "imageInput.h"
 
 
-static void prepareImageFile(const char *path, unsigned short int width, unsigned short int height, unsigned int short numberOfImages, unsigned char label)
+static void prepareImageFile(const char *path, unsigned short int width, unsigned short int height, unsigned int short numberOfImages, unsigned char label, unsigned short greyScaleTest)
 {
     FILE *file = fopen(path, "wb");
 
@@ -17,6 +17,14 @@ static void prepareImageFile(const char *path, unsigned short int width, unsigne
 
         if(zeroBuffer != NULL)
         {
+            if(greyScaleTest)
+            {
+                for(unsigned int i = 0; i < (numberOfImages * width * height); i++)
+                {
+                    zeroBuffer[i] = (GrayScalePixelType)i;
+                }
+            }
+
             fwrite(fileTag, sizeof(fileTag[0]), strlen(fileTag), file);
             fwrite(&numberOfImages, sizeof(numberOfImages), 1, file);
             fwrite(&width, sizeof(width), 1, file);
@@ -41,7 +49,7 @@ void test_readImagesReturnsCorrectNumberOfImages(void)
     GrayScaleImageSeries *series = NULL;
     const unsigned short expectedNumberOfImages = 2;
     const char *path = "testFile.info2";
-    prepareImageFile(path, 8, 8, expectedNumberOfImages, 1);
+    prepareImageFile(path, 8, 8, expectedNumberOfImages, 1, 0);
     series = readImages(path);
     TEST_ASSERT_NOT_NULL(series);
     TEST_ASSERT_EQUAL_UINT16(expectedNumberOfImages, series->count);
@@ -54,7 +62,7 @@ void test_readImagesReturnsCorrectImageWidth(void)
     GrayScaleImageSeries *series = NULL;
     const unsigned short expectedWidth = 10;
     const char *path = "testFile.info2";
-    prepareImageFile(path, expectedWidth, 8,  2, 1);
+    prepareImageFile(path, expectedWidth, 8,  2, 1, 0);
     series = readImages(path);
     TEST_ASSERT_NOT_NULL(series);
     TEST_ASSERT_NOT_NULL(series->images);
@@ -70,7 +78,7 @@ void test_readImagesReturnsCorrectImageHeight(void)
     GrayScaleImageSeries *series = NULL;
     const unsigned short expectedHeight = 10;
     const char *path = "testFile.info2";
-    prepareImageFile(path, 8,  expectedHeight, 2, 1);
+    prepareImageFile(path, 8,  expectedHeight, 2, 1, 0);
     series = readImages(path);
     TEST_ASSERT_NOT_NULL(series);
     TEST_ASSERT_NOT_NULL(series->images);
@@ -87,7 +95,7 @@ void test_readImagesReturnsCorrectLabels(void)
 
     GrayScaleImageSeries *series = NULL;
     const char *path = "testFile.info2";
-    prepareImageFile(path, 8, 8, 2, expectedLabel);
+    prepareImageFile(path, 8, 8, 2, expectedLabel, 0);
     series = readImages(path);
     TEST_ASSERT_NOT_NULL(series);
     TEST_ASSERT_NOT_NULL(series->labels);
@@ -119,6 +127,27 @@ void test_readImagesFailsOnWrongFileTag(void)
     remove(path);
 }
 
+void test_readImagesReadsCorrectGrayScales(void)
+{
+    GrayScaleImageSeries *series = NULL;
+    const char *path = "testFile.info2";
+    
+    prepareImageFile(path, 8, 8, 1, 1, 1);
+    series = readImages(path);
+
+    TEST_ASSERT_NOT_NULL(series);
+    TEST_ASSERT_NOT_NULL(series->images);
+    TEST_ASSERT_EQUAL_UINT16(1, series->count);
+
+    for (unsigned int i = 0; i < (8 * 8); i++)
+    {
+        TEST_ASSERT_EQUAL_UINT8((GrayScalePixelType)i, series->images->buffer[i]);
+    }
+
+    clearSeries(series);
+    remove(path);
+}
+
 void setUp(void) {
     // Falls notwendig, kann hier Vorbereitungsarbeit gemacht werden
 }
@@ -138,6 +167,7 @@ int main()
     RUN_TEST(test_readImagesReturnsCorrectLabels);
     RUN_TEST(test_readImagesReturnsNullOnNotExistingPath);
     RUN_TEST(test_readImagesFailsOnWrongFileTag);
+    RUN_TEST(test_readImagesReadsCorrectGrayScales);
 
     return UNITY_END();
 }
\ No newline at end of file