diff --git a/glue/core/data_factories/tests/test_pandas.py b/glue/core/data_factories/tests/test_pandas.py
index 815be02d5..57c4d9aea 100644
--- a/glue/core/data_factories/tests/test_pandas.py
+++ b/glue/core/data_factories/tests/test_pandas.py
@@ -45,8 +45,8 @@ def test_translator_from_data():
 
     with pytest.raises(ValueError) as exc:
         df = data.get_object()
-    assert exc.value.args[0] == ('Specify the object class to use with cls= - supported '
-                                 'classes are:\n\n* pandas.core.frame.DataFrame')
+    #  Do not specify full error message in case plugins add new translations
+    assert 'Specify the object class to use with cls' in exc.value.args[0]
 
     df = data.get_object(cls=DataFrame)
     assert_equal(list(df.columns), ['a', 'b', 'c'])
diff --git a/glue/core/tests/test_data_translation.py b/glue/core/tests/test_data_translation.py
index 2956cb843..01e95e77b 100644
--- a/glue/core/tests/test_data_translation.py
+++ b/glue/core/tests/test_data_translation.py
@@ -112,9 +112,8 @@ def test_get_object_explicit_class(self):
 
         with pytest.raises(ValueError) as exc:
             data.get_object()
-        assert exc.value.args[0] == ('Specify the object class to use with cls= - '
-                                     'supported classes are:\n\n* pandas.core.frame.DataFrame\n'
-                                     '* glue.core.tests.test_data_translation.FakeDataObject')
+        assert 'Specify the object class to use with cls' in exc.value.args[0]
+        assert 'glue.core.tests.test_data_translation.FakeDataObject' in exc.value.args[0]
 
         obj = data.get_object(cls=FakeDataObject)
         assert isinstance(obj, FakeDataObject)
@@ -142,9 +141,8 @@ def test_get_subset_object_explicit_class(self):
 
         with pytest.raises(ValueError) as exc:
             data.get_subset_object()
-        assert exc.value.args[0] == ('Specify the object class to use with cls= - '
-                                     'supported classes are:\n\n* pandas.core.frame.DataFrame\n'
-                                     '* glue.core.tests.test_data_translation.FakeDataObject')
+        assert 'Specify the object class to use with cls' in exc.value.args[0]
+        assert 'glue.core.tests.test_data_translation.FakeDataObject' in exc.value.args[0]
 
         subset = data.get_subset_object(subset_id=0, cls=FakeDataObject)