diff --git a/booltest/booltest_main.py b/booltest/booltest_main.py
index cb2e02b5..85b04f11 100644
--- a/booltest/booltest_main.py
+++ b/booltest/booltest_main.py
@@ -737,7 +737,7 @@ def load_input_objects(self):
         :return:
         """
         for file in self.args.files:
-            io = common.FileInputObject(fname=file)
+            io = common.FileInputObject(fname=file, fmode='rb')
             io.check()
             self.input_objects.append(io)
 
diff --git a/booltest/common.py b/booltest/common.py
index 5805ca8c..397b15af 100644
--- a/booltest/common.py
+++ b/booltest/common.py
@@ -367,13 +367,21 @@ class FileInputObject(InputObject):
     File input object - reading from the file
     """
     def __init__(self, fname, *args, **kwargs):
+        """
+        File reading input object
+        :param fname:
+        :param fmode:
+        :param args:
+        :param kwargs:
+        """
         super(FileInputObject, self).__init__(*args, **kwargs)
         self.fname = fname
+        self.fmode = kwargs.get('fmode', 'r')
         self.fh = None
 
     def __enter__(self):
         super(FileInputObject, self).__enter__()
-        self.fh = open(self.fname, 'r')
+        self.fh = open(self.fname, self.fmode)
 
     def __exit__(self, exc_type, exc_val, exc_tb):
         super(FileInputObject, self).__exit__(exc_type, exc_val, exc_tb)