diff --git a/core/modules/field/src/Tests/Number/NumberFieldTest.php b/core/modules/field/src/Tests/Number/NumberFieldTest.php
index c85c26f..0f548ad 100644
--- a/core/modules/field/src/Tests/Number/NumberFieldTest.php
+++ b/core/modules/field/src/Tests/Number/NumberFieldTest.php
@@ -41,7 +41,8 @@ protected function setUp() {
   public function testNumberDecimalField() {
     // Create a field with settings to validate.
     $field_name = Unicode::strtolower($this->randomMachineName());
-    // precision=10 scale=4 => 6 numbers before the decimal point and 4 after.
+    // Having precision = 10 and scale = 4 means 6 numbers before the decimal
+    // point and 4 after.
     FieldStorageConfig::create([
       'field_name' => $field_name,
       'entity_type' => 'entity_test',
@@ -80,10 +81,10 @@ public function testNumberDecimalField() {
       '-1234.5678',
       '19999.0000',
       '99999.0000',
-      // '909888.96', This fails!
+      '909888.96',
       '909888.99',
       '988999.0096',
-      // '988999.0099', This fails!
+      '988999.0099',
     ];
 
     foreach ($valid_entries as $valid_entry) {
diff --git a/core/tests/Drupal/Tests/Component/Utility/NumberTest.php b/core/tests/Drupal/Tests/Component/Utility/NumberTest.php
index b494fac..ffe0b9f 100644
--- a/core/tests/Drupal/Tests/Component/Utility/NumberTest.php
+++ b/core/tests/Drupal/Tests/Component/Utility/NumberTest.php
@@ -75,6 +75,7 @@ public static function providerTestValidStep() {
       [1000, -10, TRUE],
 
       // Valid and very small float steps.
+      [1936.5, 3e-8, TRUE],
       [1000.12345, 1e-10, TRUE],
       [3.9999999999999, 1e-13, TRUE],
 
@@ -88,14 +89,13 @@ public static function providerTestValidStep() {
 
       // Step mismatches very close to being valid.
       [70 + 9e-7, 10 + 9e-7, FALSE],
-      [1936.5, 3e-8, FALSE],
 
       // These floats are valid, but might trigger FP math idiosyncrasies.
       // @see https://www.drupal.org/node/2230909
-      [9990009888.96, 0.01, FALSE],
+      [9990009888.96, 0.01, TRUE],
       [9990009888.99, 0.01, TRUE],
       [990088999.0096, 0.0001, TRUE],
-      [990088999.0099, 0.0001, FALSE],
+      [990088999.0099, 0.0001, TRUE],
     ];
   }