diff --git a/info2praktikum-neuronalesnetz/imageInputTests.c b/info2praktikum-neuronalesnetz/imageInputTests.c
index c20f29b..ffe6266 100644
--- a/info2praktikum-neuronalesnetz/imageInputTests.c
+++ b/info2praktikum-neuronalesnetz/imageInputTests.c
@@ -4,6 +4,7 @@
 #include <string.h>
 #include "unity.h"
 #include "imageInput.h"
+#define FILE_HEADER_STRING "__info2_image_file_format__"
 
 
 static void prepareImageFile(const char *path, unsigned short int width, unsigned short int height, unsigned int short numberOfImages, unsigned char label)
@@ -64,6 +65,19 @@ static void prepareImageFileIncorrectTag(const char *path, unsigned short int wi
     }
 }
 
+void test_readImagesFailsOnIncompleteHeader(void) {
+    const char *path = "testIncompleteHeader.info2";
+    FILE *file = fopen(path, "wb");
+    if (file) {
+        fwrite(FILE_HEADER_STRING, 1, strlen(FILE_HEADER_STRING), file);
+
+        unsigned char incompleteHeader[2] = {0x01, 0x00};
+        fwrite(incompleteHeader, 1, 2, file);
+        fclose(file);
+    }
+    TEST_ASSERT_NULL(readImages(path));
+    remove(path);
+}
 
 void test_readImagesReturnsCorrectNumberOfImages(void)
 {
@@ -179,6 +193,7 @@ int main()
     RUN_TEST(test_readImagesReturnsNullOnNotExistingPath);
     RUN_TEST(test_readImagesFailsOnWrongFileTag);
     RUN_TEST(test_openImageFileIncorrectTag);
+    RUN_TEST(test_readImagesFailsOnIncompleteHeader);
 
     return UNITY_END();
 }
\ No newline at end of file