diff --git a/autocmake/parse_yaml.py b/autocmake/parse_yaml.py
index 1824b38..447d16d 100644
--- a/autocmake/parse_yaml.py
+++ b/autocmake/parse_yaml.py
@@ -1,5 +1,6 @@
 def parse_yaml(stream, override={}):
     import yaml
+    import sys
     from autocmake.interpolate import interpolate
 
     try:
@@ -14,3 +15,23 @@ def parse_yaml(stream, override={}):
 
     config = interpolate(config, config)
     return config
+
+
+def test_parse_yaml():
+    import tempfile
+    import os
+
+    text = """foo: bar
+this: that
+var: '%(foo)'"""
+
+    # we save this text to a temporary file
+    file_name = tempfile.mkstemp()[1]
+    with open(file_name, 'w') as f:
+        f.write(text)
+
+    with open(file_name, 'r') as f:
+        assert parse_yaml(f) == {'foo': 'bar', 'this': 'that', 'var': 'bar'}
+
+    # we remove the temporary file
+    os.unlink(file_name)