diff --git a/package/postgresql/postgresql.hash b/package/postgresql/postgresql.hash
index 6a15f78628fb..88730dc353c7 100644
--- a/package/postgresql/postgresql.hash
+++ b/package/postgresql/postgresql.hash
@@ -1,4 +1,4 @@
-# From https://ftp.postgresql.org/pub/source/v16.5/postgresql-16.5.tar.bz2.sha256
-sha256  a6cbbb7037f98cb8afa7d3970b7c48040cf02b115e39253a0c037a8bb8e778f0  postgresql-16.5.tar.bz2
+# From https://ftp.postgresql.org/pub/source/v16.6/postgresql-16.6.tar.bz2.sha256
+sha256  23369cdaccd45270ac5dcc30fa9da205d5be33fa505e1f17a0418d2caeca477b  postgresql-16.6.tar.bz2
 # License file, Locally calculated
 sha256  9bf20ee493926a7e17a74bc7f05089fbc014269667b1540bc35a6b194a40c9de  COPYRIGHT
diff --git a/package/postgresql/postgresql.mk b/package/postgresql/postgresql.mk
index 12693e625c2c..4656eba3d8c5 100644
--- a/package/postgresql/postgresql.mk
+++ b/package/postgresql/postgresql.mk
@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-POSTGRESQL_VERSION = 16.5
+POSTGRESQL_VERSION = 16.6
 POSTGRESQL_SOURCE = postgresql-$(POSTGRESQL_VERSION).tar.bz2
 POSTGRESQL_SITE = https://ftp.postgresql.org/pub/source/v$(POSTGRESQL_VERSION)
 POSTGRESQL_LICENSE = PostgreSQL
diff --git a/support/testing/tests/package/test_mosquitto.py b/support/testing/tests/package/test_mosquitto.py
index ba10b30b00b5..6b256e5e27f0 100644
--- a/support/testing/tests/package/test_mosquitto.py
+++ b/support/testing/tests/package/test_mosquitto.py
@@ -25,13 +25,19 @@ def test_run(self):
         msg = "Hello Buildroot!"
 
         # We subscribe to a topic and write one message to a log file.
-        self.assertRunOk(f"mosquitto_sub -t {topic} -C 1 > {log} &")
+        cmd = f"( mosquitto_sub -t {topic} -C 1 > {log} 2> /dev/null & )"
+        self.assertRunOk(cmd)
 
-        time.sleep(1)
+        # We give some time to the subscriber process to settle.
+        time.sleep(5)
 
         # We publish a message.
         self.assertRunOk(f"mosquitto_pub -t {topic} -m '{msg}'")
 
+        # We give some more time to the subscriber process to write
+        # the log and quit.
+        time.sleep(5)
+
         # We check the log file contains our message.
         out, ret = self.emulator.run(f"cat {log}")
         self.assertEqual(ret, 0)