diff --git a/.travis.yml b/.travis.yml
index 0aa9e9fa..0e7a3701 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -22,6 +22,7 @@ env:
     - PYTHON_VERSION=2 PG_VERSION=9.6
     - PYTHON_VERSION=2 PG_VERSION=9.5
     - PYTHON_VERSION=2 PG_VERSION=9.4
+    - PYTHON_VERSION=3 PG_VERSION=13
     - PYTHON_VERSION=3 PG_VERSION=12
     - PYTHON_VERSION=3 PG_VERSION=11
     - PYTHON_VERSION=3 PG_VERSION=10
diff --git a/testgres/consts.py b/testgres/consts.py
index dcde873a..98c84af6 100644
--- a/testgres/consts.py
+++ b/testgres/consts.py
@@ -30,6 +30,7 @@
 MAX_REPLICATION_SLOTS = 10
 MAX_WORKER_PROCESSES = 10
 WAL_KEEP_SEGMENTS = 20
+WAL_KEEP_SIZE = 320
 MAX_WAL_SENDERS = 10
 
 # logical replication settings
diff --git a/testgres/node.py b/testgres/node.py
index 01b3ad56..81866e89 100644
--- a/testgres/node.py
+++ b/testgres/node.py
@@ -519,9 +519,14 @@ def get_auth_method(t):
             # select a proper wal_level for PostgreSQL
             wal_level = 'replica' if self._pg_version >= '9.6' else 'hot_standby'
 
-            self.append_conf(hot_standby=True,
-                             wal_keep_segments=WAL_KEEP_SEGMENTS,
-                             wal_level=wal_level)  # yapf: disable
+            if self._pg_version < '13':
+                self.append_conf(hot_standby=True,
+                                 wal_keep_segments=WAL_KEEP_SEGMENTS,
+                                 wal_level=wal_level)  # yapf: disable
+            else:
+                self.append_conf(hot_standby=True,
+                        wal_keep_size=WAL_KEEP_SIZE,
+                        wal_level=wal_level)  # yapf: disable
 
         # logical replication
         if allow_logical: