diff --git a/cache/stores/redis/lib.php b/cache/stores/redis/lib.php
index 2b81e8eaf41..5c469056d85 100644
--- a/cache/stores/redis/lib.php
+++ b/cache/stores/redis/lib.php
@@ -234,6 +234,15 @@ class cachestore_redis extends cache_store implements cache_is_key_aware, cache_
 
                 // We only need the first record for the single redis.
                 if (!$clustermode) {
+                    // Handle the case when the server is not a Unix domain socket.
+                    if ($port !== 0) {
+                        // We only need the first record for the single redis.
+                        $serverchunks = explode(':', $trimmedservers[0]);
+                        // Get the last chunk as the port.
+                        $port = array_pop($serverchunks);
+                        // Combine the rest of the chunks back into a string as the server.
+                        $server = implode(':', $serverchunks);
+                    }
                     break;
                 }
             }
@@ -259,8 +268,6 @@ class cachestore_redis extends cache_store implements cache_is_key_aware, cache_
             if ($clustermode) {
                 $redis = new RedisCluster(null, $trimmedservers, 1, 1, true, $password, !empty($opts) ? $opts : null);
             } else {
-                // We only need the first record for the single redis.
-                list($server, $port) = explode(':', $trimmedservers[0]);
                 $redis = new Redis();
                 $redis->connect($server, $port, 1, null, 100, 1, $opts);
                 if (!empty($password)) {
diff --git a/lib/classes/session/redis.php b/lib/classes/session/redis.php
index 93930adcbfe..2d67ea7909e 100644
--- a/lib/classes/session/redis.php
+++ b/lib/classes/session/redis.php
@@ -117,9 +117,6 @@ class redis extends handler implements SessionHandlerInterface {
         }
 
         if (isset($CFG->session_redis_encrypt) && $CFG->session_redis_encrypt) {
-            if (!$this->clustermode) {
-                $this->host[0] = 'tls://' . $this->host[0];
-            }
             $this->sslopts = $CFG->session_redis_encrypt;
         }
 
@@ -228,7 +225,7 @@ class redis extends handler implements SessionHandlerInterface {
                     $port = 0;
                     $trimmedservers[] = $server;
                 } else {
-                    $port = 6379; // No Unix socket so set default port.
+                    $port = $this->port ?? 6379; // No Unix socket so set default port.
                     if (strpos($server, ':')) { // Check for custom port.
                         list($server, $port) = explode(':', $server);
                     }
@@ -237,6 +234,12 @@ class redis extends handler implements SessionHandlerInterface {
 
                 // We only need the first record for the single redis.
                 if (!$this->clustermode) {
+                    // Handle the case when the server is not a Unix domain socket.
+                    if ($port !== 0) {
+                        list($server, ) = explode(':', $trimmedservers[0]);
+                    } else {
+                        $server = $trimmedservers[0];
+                    }
                     break;
                 }
             }
@@ -266,9 +269,8 @@ class redis extends handler implements SessionHandlerInterface {
                         $this->auth, !empty($opts) ? $opts : null);
                 } else {
                     $delay = rand(100, 500);
-                    list($server, $port) = explode(':', $trimmedservers[0]);
                     $this->connection = new \Redis();
-                    $this->connection->connect($server, $this->port ?? $port, 1, null, $delay, 1, $opts);
+                    $this->connection->connect($server, $port, 1, null, $delay, 1, $opts);
                     if ($this->auth !== '' && !$this->connection->auth($this->auth)) {
                         throw new $exceptionclass('Unable to authenticate.');
                     }
@@ -296,7 +298,7 @@ class redis extends handler implements SessionHandlerInterface {
                 }
                 return true;
             } catch (RedisException | RedisClusterException $e) {
-                $redishost = $this->clustermode ? implode(',', $this->host) : $this->host[0].':'.$this->port ?? $port;
+                $redishost = $this->clustermode ? implode(',', $this->host) : $server . ':' . $port;
                 $logstring = "Failed to connect (try {$counter} out of " . self::MAX_RETRIES . ") to Redis ";
                 $logstring .= "at ". $redishost .", the error returned was: {$e->getMessage()}";
                 debugging($logstring);
diff --git a/lib/tests/session_redis_test.php b/lib/tests/session_redis_test.php
index 1628f34e842..56ef3a57c43 100644
--- a/lib/tests/session_redis_test.php
+++ b/lib/tests/session_redis_test.php
@@ -69,13 +69,14 @@ class session_redis_test extends \advanced_testcase {
 
         $this->keyprefix = 'phpunit'.rand(1, 100000);
 
-        $CFG->session_redis_host = TEST_SESSION_REDIS_HOST;
         if (strpos(TEST_SESSION_REDIS_HOST, ':')) {
             list($server, $port) = explode(':', TEST_SESSION_REDIS_HOST);
         } else {
             $server = TEST_SESSION_REDIS_HOST;
             $port = 6379;
         }
+        $CFG->session_redis_host = $server;
+        $CFG->session_redis_port = $port;
 
         $opts = [];
         if (defined('TEST_SESSION_REDIS_ENCRYPT') && TEST_SESSION_REDIS_ENCRYPT) {
@@ -344,10 +345,10 @@ class session_redis_test extends \advanced_testcase {
             $actual = $e->getMessage();
         }
 
-        $host = TEST_SESSION_REDIS_HOST;
-        if ($this->encrypted) {
-            $host = "tls://$host";
-        }
+        // The Redis session test config allows the user to put the port number inside the host. e.g. 127.0.0.1:6380.
+        // Therefore, to get the host, we need to explode it.
+        list($host, ) = explode(':', TEST_SESSION_REDIS_HOST);
+
         $expected = "Failed to connect (try 5 out of 5) to Redis at $host:111111";
         $this->assertDebuggingCalledCount(5);
         $this->assertStringContainsString($expected, $actual);
@@ -367,7 +368,8 @@ class session_redis_test extends \advanced_testcase {
 
         $sess = new \core\session\redis();
 
-        $prop = new \ReflectionProperty(\core\session\redis::class, 'host');
-        $this->assertEquals('tls://' . TEST_SESSION_REDIS_HOST, $prop->getValue($sess)[0]);
+        $prop = new \ReflectionProperty(\core\session\redis::class, 'sslopts');
+
+        $this->assertEquals($CFG->session_redis_encrypt, $prop->getValue($sess));
     }
 }