diff --git a/pcbdevice/tests/utils/test_formatPbm.py b/pcbdevice/tests/utils/test_formatPbm.py
deleted file mode 100644
index 90d70e3..0000000
--- a/pcbdevice/tests/utils/test_formatPbm.py
+++ /dev/null
@@ -1,7 +0,0 @@
-from unittest import TestCase
-
-
-class TestFormatPbm(TestCase):
-	
-	def test_formatPbm(self):
-		assert True
diff --git a/pcbdevice/utils/FileUtils.py b/pcbdevice/utils/FileUtils.py
index 85829f6..4072edf 100644
--- a/pcbdevice/utils/FileUtils.py
+++ b/pcbdevice/utils/FileUtils.py
@@ -16,7 +16,7 @@ class FileUtils:
 		
 		matrix = [[0 for i in range(width)] for j in range(height)]
 		for index, value in enumerate(completeFile):
-			matrix[math.floor(index / width)][index % width] = value
+			matrix[int(math.floor(index / width))][index % width] = value
 		
 		return matrix