diff --git a/core/modules/link/src/Tests/LinkFieldUITest.php b/core/modules/link/src/Tests/LinkFieldUITest.php
index ac349a0..109475b 100644
--- a/core/modules/link/src/Tests/LinkFieldUITest.php
+++ b/core/modules/link/src/Tests/LinkFieldUITest.php
@@ -57,8 +57,8 @@ function testFieldUI() {
 
     // Add a link field to the newly-created type. It defaults to allowing both
     // internal and external links.
-    $label = $this->randomMachineName();
-    $description = $this->randomMachineName();
+    $label = 'link_field_label';
+    $description = 'link field description';
     $field_name = Unicode::strtolower($label);
     $field_edit = [
       'description' => $description,
@@ -85,6 +85,7 @@ function testFieldUI() {
       LinkItemInterface::LINK_GENERIC,
       LinkItemInterface::LINK_INTERNAL,
     ];
+    $field_count = 0;
     // Test all variations of link types on all cardinalities.
     foreach ($cardinalities as $cardinality) {
       foreach ($link_types as $link_type) {
@@ -92,6 +93,7 @@ function testFieldUI() {
         foreach ($title_settings as $title_setting) {
           // Both test empty descriptions and not empty descriptions.
           foreach ([TRUE, FALSE] as $description_enabled) {
+            $field_count++;
             // Output variation being tested for debugging purpose.
             $this->verbose("Now testing - cardinality: $cardinality - link_type:
             $link_type, title_setting: $title_setting, description_enabled:
@@ -107,8 +109,8 @@ function testFieldUI() {
 
             // Create a field for this content type with the current cardinality
             // and link field settings.
-            $label = $this->randomMachineName();
-            $description = $this->randomMachineName();
+            $label = "link_field_label_$field_count";
+            $description = '<img src="http://example.com" />link field description with html ' . $field_count;
             $field_name = Unicode::strtolower($label);
             $storage_edit = ['cardinality_number' => $cardinality];
             $field_edit = [
@@ -126,8 +128,8 @@ function testFieldUI() {
             // Check that the help texts we assume should be there, is there.
             switch ($link_type) {
               case LinkItemInterface::LINK_GENERIC:
-                // Check that the text for allowing both internal and external is
-                // present.
+                // Check that the text for allowing both internal and external
+                // is present.
                 $this->assertRaw('You can also enter an internal path such as <em class="placeholder">/node/add</em> or an external URL such as <em class="placeholder">http://example.com</em>.');
                 break;
 
@@ -137,8 +139,8 @@ function testFieldUI() {
                 break;
 
               case LinkItemInterface::LINK_INTERNAL:
-                // Internal links have no "system" description. Test that none of
-                // the above shows here.
+                // Internal links have no "system" description. Test that none
+                // of the above shows here.
                 $this->assertNoRaw('This must be an external URL such as <em class="placeholder">http://example.com</em>.');
                 $this->assertNoRaw('You can also enter an internal path such as <em class="placeholder">/node/add</em> or an external URL such as <em class="placeholder">http://example.com</em>.');
                 // And assert that the field prefix is the internal URL.