diff --git a/src/python/paperai/api.py b/src/python/paperai/api.py
index aac4090..3e8c909 100644
--- a/src/python/paperai/api.py
+++ b/src/python/paperai/api.py
@@ -10,6 +10,10 @@
 from paperai.query import Query
 
 class API(txtai.api.API):
+    """
+    Extended API on top of txtai to return enriched query results.
+    """
+
     def search(self, query, request):
         """
         Extends txtai API to enrich results with content.
@@ -24,23 +28,23 @@ def search(self, query, request):
 
         if self.embeddings:
             dbfile = os.path.join(self.config["path"], "articles.sqlite")
-            topn = int(request.query_params.get("topn", 10))
-            threshold = float(request.query_params.get("threshold", 0.6))
+            limit = self.limit(request.query_params.get("limit"))
+            threshold = float(request.query_params["threshold"]) if "threshold" in request.query_params else None
 
             with sqlite3.connect(dbfile) as db:
                 cur = db.cursor()
 
                 # Query for best matches
-                results = Query.search(self.embeddings, cur, query, topn, threshold)
+                results = Query.search(self.embeddings, cur, query, limit, threshold)
 
                 # Get results grouped by document
-                documents = Query.documents(results, topn)
+                documents = Query.documents(results, limit)
 
                 articles = []
 
                 # Print each result, sorted by max score descending
                 for uid in sorted(documents, key=lambda k: sum([x[0] for x in documents[k]]), reverse=True):
-                    cur.execute("SELECT Title, Published, Publication, Design, Size, Sample, Method, Entry, Id, Reference " + 
+                    cur.execute("SELECT Title, Published, Publication, Design, Size, Sample, Method, Entry, Id, Reference " +
                                 "FROM articles WHERE id = ?", [uid])
                     article = cur.fetchone()
 
@@ -54,3 +58,5 @@ def search(self, query, request):
                     articles.append(article)
 
                 return articles
+
+        return None
diff --git a/test/python/testapi.py b/test/python/testapi.py
index bee5f54..52cdd1b 100644
--- a/test/python/testapi.py
+++ b/test/python/testapi.py
@@ -2,7 +2,6 @@
 API module tests
 """
 
-import hashlib
 import os
 import tempfile
 import unittest
@@ -47,25 +46,20 @@ def start():
 
         return client
 
-    @classmethod
-    def setUpClass(cls):
+    def testSearch(self):
         """
-        Create API client on creation of class.
+        Test search via API
         """
 
         # Build embeddings index
         Index.run(Utils.PATH, Utils.VECTORFILE)
 
-        cls.client = TestAPI.start()
-
-    def testSearch(self):
-        """
-        Test search via API
-        """
+        # Connect to test instance
+        client = TestAPI.start()
 
+        # Run search
         params = urllib.parse.urlencode({"query": "+hypertension ci", "limit": 1})
+        results= client.get("search?%s" % params).json()
 
-        values = ["%s%s" % (k, v) for k, v in sorted(self.client.get("search?%s" % params).json()[0].items())]
-        md5 = hashlib.md5(" ".join(values).encode()).hexdigest()
-
-        self.assertEqual(md5, "07ee525ff2b50142c88fb50afcf46582")
+        # Check number of results
+        self.assertEqual(len(results), 1)