--- a
+++ b/tests/test_utils.py
@@ -0,0 +1,10 @@
+import pkg_resources
+
+from janggu.utils import get_genome_size
+
+
+def test_genome_size():
+    data_path = pkg_resources.resource_filename('janggu', 'resources/')
+    gsize = get_genome_size('sacCer3', data_path)
+    print(gsize)
+    assert gsize['chrXV'] == 1091291