diff --git a/docs/ref/contrib/gis/install/geolibs.txt b/docs/ref/contrib/gis/install/geolibs.txt
index 98b907e657..d6793299fe 100644
--- a/docs/ref/contrib/gis/install/geolibs.txt
+++ b/docs/ref/contrib/gis/install/geolibs.txt
@@ -12,7 +12,7 @@ Program                   Description                           Required
 `PROJ.4`_                 Cartographic Projections library      Yes (PostgreSQL and SQLite only)  4.9, 4.8, 4.7, 4.6, 4.5, 4.4
 :doc:`GDAL <../gdal>`     Geospatial Data Abstraction Library   Yes                               2.1, 2.0, 1.11, 1.10, 1.9, 1.8, 1.7
 :doc:`GeoIP <../geoip>`   IP-based geolocation library          No                                1.4
-`PostGIS`__               Spatial extensions for PostgreSQL     Yes (PostgreSQL only)             2.2, 2.1
+`PostGIS`__               Spatial extensions for PostgreSQL     Yes (PostgreSQL only)             2.3, 2.2, 2.1
 `SpatiaLite`__            Spatial extensions for SQLite         Yes (SQLite only)                 4.3, 4.2, 4.1, 4.0
 ========================  ====================================  ================================  ===================================
 
@@ -37,6 +37,7 @@ totally fine with GeoDjango. Your mileage may vary.
     GDAL 2.1.0 2016-04
     PostGIS 2.1.0 2013-08-17
     PostGIS 2.2.0 2015-10-17
+    PostGIS 2.3.0 2016-09-26
     SpatiaLite 4.0.0 2012-11-25
     SpatiaLite 4.1.0 2013-06-04
     SpatiaLite 4.2.0 2014-07-25
diff --git a/tests/gis_tests/geoapp/test_functions.py b/tests/gis_tests/geoapp/test_functions.py
index 1a1727dbbc..0e5f2ee693 100644
--- a/tests/gis_tests/geoapp/test_functions.py
+++ b/tests/gis_tests/geoapp/test_functions.py
@@ -147,13 +147,16 @@ class GISFunctionsTests(TestCase):
 
     @skipUnlessDBFeature("has_BoundingCircle_function")
     def test_bounding_circle(self):
+        # The weak precision in the assertions is because the BoundingCircle
+        # calculation changed on PostGIS 2.3.
         qs = Country.objects.annotate(circle=functions.BoundingCircle('mpoly')).order_by('name')
-        self.assertAlmostEqual(qs[0].circle.area, 168.89, 2)
-        self.assertAlmostEqual(qs[1].circle.area, 135.95, 2)
+        self.assertAlmostEqual(qs[0].circle.area, 169, 0)
+        self.assertAlmostEqual(qs[1].circle.area, 136, 0)
 
         qs = Country.objects.annotate(circle=functions.BoundingCircle('mpoly', num_seg=12)).order_by('name')
-        self.assertAlmostEqual(qs[0].circle.area, 168.44, 2)
-        self.assertAlmostEqual(qs[1].circle.area, 135.59, 2)
+        self.assertGreater(qs[0].circle.area, 168.4, 0)
+        self.assertLess(qs[0].circle.area, 169.5, 0)
+        self.assertAlmostEqual(qs[1].circle.area, 136, 0)
 
     @skipUnlessDBFeature("has_Centroid_function")
     def test_centroid(self):