diff --git a/src/tests/testSgfParser.py b/src/tests/testSgfParser.py
--- a/src/tests/testSgfParser.py
+++ b/src/tests/testSgfParser.py
@@ -20,6 +20,16 @@ class TestProperty(TestCase):
 
 
 class TestCollection(TestCase):
+	def testSubtrees(self):
+		c=Collection("""
+(;B[aa]
+	(;W[ab]PB[Some Black]PW[Some White];B[ac])
+	(;W[bb]PB[Other Black]PW[Other White])
+)""")
+		games=list(c.listGames())
+
+		self.assertEqual(len(games),2)
+
 	def testEmptySgf(self):
 		Collection("(;)")