revert fixture decorator for now, switch to append. no more globals
diff --git a/tests/test_utils.py b/tests/test_utils.py
index a7da490..f852f3a 100644
--- a/tests/test_utils.py
+++ b/tests/test_utils.py
@@ -35,9 +35,9 @@
     b3 = pretend.stub(name="b3")
     backends = [b1, b2, b3]
     name = "b2"
-    select_backends(name, backends)
-    assert len(backends) == 1
-    assert backends[0] == b2
+    selected_backends = select_backends(name, backends)
+    assert len(selected_backends) == 1
+    assert selected_backends[0] == b2
 
 
 def test_select_no_backend():
@@ -56,8 +56,8 @@
     b3 = pretend.stub(name="b3")
     backends = [b1, b2, b3]
     name = None
-    select_backends(name, backends)
-    assert len(backends) == 3
+    selected_backends = select_backends(name, backends)
+    assert len(selected_backends) == 3
 
 
 def test_select_two_backends():
@@ -66,9 +66,9 @@
     b3 = pretend.stub(name="b3")
     backends = [b1, b2, b3]
     name = "b2 ,b1 "
-    select_backends(name, backends)
-    assert len(backends) == 2
-    assert backends == [b1, b2]
+    selected_backends = select_backends(name, backends)
+    assert len(selected_backends) == 2
+    assert selected_backends == [b1, b2]
 
 
 def test_check_for_iface():