diff --git a/factor/email/tests/factor_test.php b/factor/email/tests/factor_test.php
index faeb347d..e61ace97 100644
--- a/factor/email/tests/factor_test.php
+++ b/factor/email/tests/factor_test.php
@@ -35,29 +35,23 @@ public function generate_email_ip_address_location_provider(): array {
         return [
             'real ip v4' => [
                 // Note - this is the same IP address used by core_iplookup_geoplugin_testcase.
-                'ip' => '50.0.184.0',
-                'isunknown' => false
+                'ip' => '50.0.184.0'
             ],
             'real ip v6' => [
                 // Ipv6 is not supported by geoplugin, so it should be treated as unknown.
-                'ip' => '2a01:8900:2:3:8c6c:c0db:3d33:9ce6',
-                'isunknown' => true
+                'ip' => '2a01:8900:2:3:8c6c:c0db:3d33:9ce6'
             ],
             'empty ip' => [
-                'ip' => '',
-                'isunknown' => true
+                'ip' => ''
             ],
             'malformed ip' => [
-                'ip' => '1.1.1.1.1.1.1.1.1.1',
-                'isunknown' => true
+                'ip' => '1.1.1.1.1.1.1.1.1.1'
             ],
             'localhost' => [
-                'ip' => '0.0.0.0',
-                'isunknown' => true
+                'ip' => '0.0.0.0'
             ],
             'malformed ip 2' => [
-                'ip' => 'aaaaaa',
-                'isunknown' => true
+                'ip' => 'aaaaaa'
             ]
         ];
     }
@@ -66,11 +60,10 @@ public function generate_email_ip_address_location_provider(): array {
      * Tests the rendererer generate_email function with regard to its
      *
      * @param string $ip IP address to test
-     * @param bool $expectedunknown if the IP given should return an email with the unknown message in it.
      *
      * @dataProvider generate_email_ip_address_location_provider
      */
-    public function test_generate_email_ip_address_location(string $ip, bool $expectedunknown) {
+    public function test_generate_email_ip_address_location(string $ip) {
         global $DB, $PAGE;
         $this->resetAfterTest(true);
 
@@ -97,15 +90,10 @@ public function test_generate_email_ip_address_location(string $ip, bool $expect
         // We ignore this in this unit test.
         $this->resetDebugging();
 
-        $unknownstr = get_string('email:geoinfo:unknown', 'factor_email');
-
-        if ($expectedunknown) {
-            $this->assertStringContainsString($unknownstr, $email);
-        } else {
-            // Ideally we would test the email contains the correct geo info,
-            // but since the geo location of a real IP address can change
-            // we instead test that the unknown message is not there.
-            $this->assertStringNotContainsString($unknownstr, $email);
-        }
+        // Note it's difficult to know beforehand where a IP address will resolve to.
+        // So instead, we just check that it contains EITHER a location or an unknown message.
+        $containslocation = strpos($email, 'This request appears to have originated from approximately') != false;
+        $containsunknown = strpos($email, get_string('email:geoinfo:unknown', 'factor_email')) != false;
+        $this->assertTrue($containslocation || $containsunknown);
     }
 }