2 files changed, 9 insertions, 5 deletions
diff --git a/test/dialect/postgresql/test_query.py b/test/dialect/postgresql/test_query.py
index 9f92a7830..c031e43de 100644
--- a/test/dialect/postgresql/test_query.py
+++ b/test/dialect/postgresql/test_query.py
@@ -761,6 +761,7 @@ class MatchTest(fixtures.TestBase, AssertsCompiledSQL):
 
     @testing.fails_on('postgresql+psycopg2', 'uses pyformat')
     @testing.fails_on('postgresql+pypostgresql', 'uses pyformat')
+    @testing.fails_on('postgresql+pygresql', 'uses pyformat')
     @testing.fails_on('postgresql+zxjdbc', 'uses qmark')
     @testing.fails_on('postgresql+psycopg2cffi', 'uses pyformat')
     def test_expression_positional(self):
diff --git a/test/dialect/postgresql/test_types.py b/test/dialect/postgresql/test_types.py
index 8818a9941..6bcc4cf9a 100644
--- a/test/dialect/postgresql/test_types.py
+++ b/test/dialect/postgresql/test_types.py
@@ -544,11 +544,11 @@ class NumericInterpretationTest(fixtures.TestBase):
     __backend__ = True
 
     def test_numeric_codes(self):
-        from sqlalchemy.dialects.postgresql import psycopg2cffi, pg8000, \
-            psycopg2, base
+        from sqlalchemy.dialects.postgresql import pg8000, pygresql, \
+            psycopg2, psycopg2cffi, base
 
-        dialects = (pg8000.dialect(), psycopg2.dialect(),
-                    psycopg2cffi.dialect())
+        dialects = (pg8000.dialect(), pygresql.dialect(),
+                psycopg2.dialect(), psycopg2cffi.dialect())
         for dialect in dialects:
             typ = Numeric().dialect_impl(dialect)
             for code in base._INT_TYPES + base._FLOAT_TYPES + \
@@ -2757,7 +2757,10 @@ class JSONRoundTripTest(fixtures.TablesTest):
         result = engine.execute(
             select([data_table.c.data['k1'].astext])
         ).first()
-        assert isinstance(result[0], util.text_type)
+        if engine.dialect.returns_unicode_strings:
+            assert isinstance(result[0], util.text_type)
+        else:
+            assert isinstance(result[0], util.string_types)
 
     def test_query_returned_as_int(self):
         engine = testing.db