diff --git a/pytest_postgres/plugin.py b/pytest_postgres/plugin.py
index f027f0b..66f031f 100644
--- a/pytest_postgres/plugin.py
+++ b/pytest_postgres/plugin.py
@@ -15,6 +15,8 @@ def pytest_addoption(parser):
                      help='Save database container at the end')
     parser.addoption('--pg-local', action='store_true',
                      help='Check postgresql container on localhost')
+    parser.addoption('--pg-network', action='store', default=None,
+                     help='Specify docker network for the PostgreSQL container')
 
 
 @pytest.fixture(scope='session')
@@ -43,6 +45,10 @@ def pg_server(docker, request):
     pg_image = request.config.getoption('--pg-image')
     pg_reuse = request.config.getoption('--pg-reuse')
     pg_local = request.config.getoption('--pg-local')
+    pg_network = request.config.getoption('--pg-network')
+
+    if pg_local and pg_network:
+        pytest.fail('--pg-local and --pg-network are mutually exclusive.')
 
     container = None
     port = None
@@ -61,18 +67,23 @@ def pg_server(docker, request):
             image=pg_image,
             name=pg_name,
             ports={'5432/tcp': None},
+            network=pg_network if pg_network else None,
             detach=True
         )
 
     container.start()
     container.reload()
 
-    host = container.attrs['NetworkSettings']['IPAddress']
     port = 5432
-    ports = container.attrs['NetworkSettings']['Ports']
     if pg_local:
         host = '127.0.0.1'
+        ports = container.attrs['NetworkSettings']['Ports']
         port = ports['5432/tcp'][0]['HostPort']
+    elif pg_network:
+        net = container.attrs['NetworkSettings']['Networks'][pg_network]
+        host = net['IPAddress']
+    else:
+        host = container.attrs['NetworkSettings']['IPAddress']
 
     pg_params = {'database': 'postgres', 'user': 'postgres',
                  'password': 'postgres', 'host': host, 'port': port}