diff --git a/test/cases/basic_test.rb b/test/cases/basic_test.rb
index 9b9d17ee..501caad9 100644
--- a/test/cases/basic_test.rb
+++ b/test/cases/basic_test.rb
@@ -106,7 +106,7 @@ def test_set_point_wkt_wrong_type
     def test_default_value
       create_model
       obj = SpatialModel.create
-      assert_equal factory.point(0, 0).to_s, obj.default_latlon.to_s
+      assert_equal factory(srid: 0).point(0, 0), obj.default_latlon
     end
 
     def test_custom_factory
@@ -122,7 +122,7 @@ def test_custom_factory
       object.area = area
       object.save!
       object.reload
-      assert_equal area.to_s, object.area.to_s
+      assert_equal area, object.area
     end
 
     def test_spatial_factory_attrs_parsing
diff --git a/test/test_helper.rb b/test/test_helper.rb
index db3a6620..18bfdfec 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -76,8 +76,8 @@ def postgis_version
       @postgis_version ||= SpatialModel.connection.select_value("SELECT postgis_lib_version()")
     end
 
-    def factory
-      RGeo::Cartesian.preferred_factory(srid: 3785)
+    def factory(srid: 3785)
+      RGeo::Cartesian.preferred_factory(srid: srid)
     end
 
     def geographic_factory