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diff --git a/test/snapshot4.test b/test/snapshot4.test
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+# 2018 August 28
+#
+# The author disclaims copyright to this source code.  In place of
+# a legal notice, here is a blessing:
+#
+#    May you do good and not evil.
+#    May you find forgiveness for yourself and forgive others.
+#    May you share freely, never taking more than you give.
+#
+#***********************************************************************
+# This file implements regression tests for SQLite library. The focus
+# of this file is the sqlite3_snapshot_xxx() APIs.
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+ifcapable !snapshot {finish_test; return}
+set testprefix snapshot4
+
+# This test does not work with the inmemory_journal permutation. The reason
+# is that each connection opened as part of this permutation executes
+# "PRAGMA journal_mode=memory", which fails if the database is in wal mode
+# and there are one or more existing connections.
+if {[permutation]=="inmemory_journal"} {
+  finish_test
+  return
+}
+
+sqlite3 db2 test.db
+
+do_execsql_test 1.0 {
+  PRAGMA cache_size = 10;
+  CREATE TABLE t1(a, b);
+  INSERT INTO t1 VALUES(1, randomblob(400));
+  PRAGMA journal_mode = wal;
+  WITH s(i) AS (
+    SELECT 2 UNION ALL SELECT i+1 FROM s WHERE i<100
+  ) 
+  INSERT INTO t1 SELECT i, randomblob(400) FROM s;
+} {wal}
+
+do_test 1.1 {
+  execsql {
+    BEGIN;
+      SELECT count(*) FROM t1;
+  }
+} {100}
+
+do_test 1.2 {
+  db2 eval { 
+    SELECT count(*) FROM t1;
+    CREATE TABLE t2(x); 
+  }
+} {100}
+
+do_test 1.3 {
+  set ::snap [sqlite3_snapshot_get_blob db main]
+  db2 eval { PRAGMA wal_checkpoint }
+} {0 54 52}
+
+do_test 1.4 {
+  execsql {
+    COMMIT;
+    SELECT * FROM sqlite_master;
+    BEGIN;
+  }
+  sqlite3_snapshot_open_blob db main $::snap
+  execsql {
+    SELECT count(*) FROM t1
+  } 
+} {100}
+
+
+finish_test