diff --git a/vlorentz/test_mappings.py b/vlorentz/test_mappings.py
new file mode 100644
index 0000000..4336a20
--- /dev/null
+++ b/vlorentz/test_mappings.py
@@ -0,0 +1,30 @@
+import os
+import os.path
+import pprint
+
+from swh.indexer.metadata_dictionary import MAPPINGS
+
+BASE_DIR = os.path.expanduser('~/datasets/')
+
+CATEGORIES = {
+    ('GemspecMapping', 'gemspec'),
+    ('PythonPkginfoMapping', 'pkginfo'),
+}
+
+def test_category(mapping_name, category):
+    mapping = MAPPINGS[mapping_name]
+    dataset_dir = os.path.join(BASE_DIR, category)
+
+    for filename in os.listdir(dataset_dir):
+        path = os.path.join(dataset_dir, filename)
+        with open(path, 'rb') as fd:
+            file_content = fd.read()
+        print('Parsing {}:'.format(path))
+        pprint.pprint(mapping.translate(file_content))
+
+def main():
+    for (mapping_name, category) in CATEGORIES:
+        test_category(mapping_name, category)
+
+if __name__ == '__main__':
+    main()