Fix broken test.

Author: jverswijver

tests/test_relational_operand.py

@@ -511,4 +511,6 @@ def test_union_multiple():
         # https://github.com/datajoint/datajoint-python/issues/926
         q1 = IJ & dict(j=2)
         q2 = (IJ & dict(j=2, i=0)) + (IJ & dict(j=2, i=1)) + (IJ & dict(j=2, i=2))
-        assert q1.fetch() == q2.fetch()
+        x = set(zip(*q1.fetch('i', 'j')))
+        y = set(zip(*q2.fetch('i', 'j')))
+        assert_set_equal(x, y)