diff --git a/md_pdf/config/read.py b/md_pdf/config/read.py
index 046064b..20ad7d2 100644
--- a/md_pdf/config/read.py
+++ b/md_pdf/config/read.py
@@ -6,7 +6,7 @@ from md_pdf.exceptions import ConfigValidationException
 
 def load_config(location=CONFIG_FILE):
     try:
-        with open(os.path.join(location)) as f:
+        with open(location) as f:
             return yaml.safe_load(f)
     except FileNotFoundError:
         raise ConfigValidationException("Can't find config file at {}".format(CONFIG_FILE))
diff --git a/tests/test_pandoc.py b/tests/test_pandoc.py
index 4725bbc..df933a7 100644
--- a/tests/test_pandoc.py
+++ b/tests/test_pandoc.py
@@ -1,7 +1,23 @@
 from tests import BaseTestCase
 from md_pdf.build.pandoc import output_html, build_document
+from md_pdf.build.md import read_files
 from md_pdf.utils import remove_dir
 import os
+import glob
+
+
+class ReadFileTestCase(BaseTestCase):
+    file_glob = 'test-files/*.md'
+
+    def test_reads_files(self):
+        files = read_files(self.file_glob)
+        self.assertNotEqual(files, '')
+
+    def test_contains_all_files(self):
+        files = read_files(self.file_glob)
+        for file in glob.iglob(self.file_glob):
+            with open(file) as f:
+                self.assertIn(f.read(), files)
 
 
 class OutputHTMLTestCase(BaseTestCase):