diff --git a/modules/order/src/Comparator/AdjustmentComparator.php b/modules/order/src/Comparator/AdjustmentComparator.php
new file mode 100644
index 00000000..0b3c5329
--- /dev/null
+++ b/modules/order/src/Comparator/AdjustmentComparator.php
@@ -0,0 +1,46 @@
+<?php
+
+namespace Drupal\commerce_order\Comparator;
+
+use Drupal\commerce_order\Adjustment;
+use SebastianBergmann\Comparator\Comparator;
+use SebastianBergmann\Comparator\ComparisonFailure;
+
+/**
+ * Provides a comparator for adjustments.
+ */
+class AdjustmentComparator extends Comparator {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function accepts($expected, $actual) {
+    return $expected instanceof Adjustment && $actual instanceof Adjustment;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function assertEquals($expected, $actual, $delta = 0.0, $canonicalize = FALSE, $ignoreCase = FALSE) {
+    assert($expected instanceof Adjustment);
+    assert($actual instanceof Adjustment);
+    $expected_array = $expected->toArray();
+    $actual_array = $actual->toArray();
+    unset($expected_array['amount'], $actual_array['amount']);
+    if (!$actual->getAmount()->equals($expected->getAmount()) || $expected_array !== $actual_array) {
+      throw new ComparisonFailure(
+        $expected,
+        $actual,
+        $expected->getLabel(),
+        $actual->getLabel(),
+        FALSE,
+        \sprintf(
+          'Failed asserting that Adjustment %s matches expected %s.',
+          $actual->getLabel(),
+          $expected->getLabel()
+        )
+      );
+    }
+  }
+
+}
diff --git a/modules/order/tests/src/Kernel/AdjustmentTest.php b/modules/order/tests/src/Kernel/AdjustmentTest.php
index 0004dfbd..56cc63fc 100644
--- a/modules/order/tests/src/Kernel/AdjustmentTest.php
+++ b/modules/order/tests/src/Kernel/AdjustmentTest.php
@@ -3,8 +3,10 @@
 namespace Drupal\Tests\commerce_order\Kernel;
 
 use Drupal\commerce_order\Adjustment;
+use Drupal\commerce_order\Comparator\AdjustmentComparator;
 use Drupal\commerce_price\Price;
 use Drupal\Tests\commerce\Kernel\CommerceKernelTestBase;
+use SebastianBergmann\Comparator\Factory as PhpUnitComparatorFactory;
 
 /**
  * @coversDefaultClass Drupal\commerce_order\Adjustment
@@ -23,6 +25,15 @@ class AdjustmentTest extends CommerceKernelTestBase {
     'commerce_order_test',
   ];
 
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp() {
+    parent::setUp();
+
+    PhpUnitComparatorFactory::getInstance()->register(new AdjustmentComparator());
+  }
+
   /**
    * Tests the constructor and definition checks.
    *
diff --git a/modules/order/tests/src/Kernel/PriceSplitterTest.php b/modules/order/tests/src/Kernel/PriceSplitterTest.php
index 5d1aa9d2..01267ad2 100644
--- a/modules/order/tests/src/Kernel/PriceSplitterTest.php
+++ b/modules/order/tests/src/Kernel/PriceSplitterTest.php
@@ -103,13 +103,16 @@ class PriceSplitterTest extends CommerceKernelTestBase {
     // Each order item should be discounted by half (9 USD).
     $amounts = $this->splitter->split($this->order, new Price('18', 'USD'));
     $expected_amount = new Price('9', 'USD');
-    $this->assertEquals([$expected_amount, $expected_amount], array_values($amounts));
+    foreach ($amounts as $amount) {
+      $this->assertEquals($expected_amount, $amount);
+    }
 
     // Same result with an explicit percentage.
     $amounts = $this->splitter->split($this->order, new Price('18', 'USD'), '0.5');
     $expected_amount = new Price('9', 'USD');
-    $this->assertEquals([$expected_amount, $expected_amount], array_values($amounts));
-
+    foreach ($amounts as $amount) {
+      $this->assertEquals($expected_amount, $amount);
+    }
     // 9.99 x 3 + 1.01 x 3 = 33.
     $first_unit_price = new Price('9.99', 'USD');
     $second_unit_price = new Price('1.01', 'USD');
@@ -121,8 +124,10 @@ class PriceSplitterTest extends CommerceKernelTestBase {
     $amounts = $this->splitter->split($this->order, $amount);
     $first_expected_amount = new Price('4.54', 'USD');
     $second_expected_amount = new Price('0.46', 'USD');
-    $this->assertEquals($amount, $first_expected_amount->add($second_expected_amount));
-    $this->assertEquals([$first_expected_amount, $second_expected_amount], array_values($amounts));
+    $this->assertEquals($first_expected_amount->add($second_expected_amount), $amount);
+    $amounts = array_values($amounts);
+    $this->assertEquals($first_expected_amount, $amounts[0]);
+    $this->assertEquals($second_expected_amount, $amounts[1]);
 
     // Split an amount that has a reminder.
     $unit_price = new Price('69.99', 'USD');
@@ -134,8 +139,10 @@ class PriceSplitterTest extends CommerceKernelTestBase {
     $amounts = $this->splitter->split($this->order, $amount, '0.3');
     $first_expected_amount = new Price('21.00', 'USD');
     $second_expected_amount = new Price('20.99', 'USD');
-    $this->assertEquals($amount, $first_expected_amount->add($second_expected_amount));
-    $this->assertEquals([$first_expected_amount, $second_expected_amount], array_values($amounts));
+    $this->assertEquals($first_expected_amount->add($second_expected_amount), $amount);
+    $amounts = array_values($amounts);
+    $this->assertEquals($first_expected_amount, $amounts[0]);
+    $this->assertEquals($second_expected_amount, $amounts[1]);
   }
 
   /**
diff --git a/modules/payment/tests/src/Functional/DefaultPaymentAdminTest.php b/modules/payment/tests/src/Functional/DefaultPaymentAdminTest.php
index 5ac8e05a..f80f13c7 100644
--- a/modules/payment/tests/src/Functional/DefaultPaymentAdminTest.php
+++ b/modules/payment/tests/src/Functional/DefaultPaymentAdminTest.php
@@ -174,8 +174,8 @@ class DefaultPaymentAdminTest extends CommerceBrowserTestBase {
     \Drupal::entityTypeManager()->getStorage('commerce_payment')->resetCache([1]);
     /** @var \Drupal\commerce_payment\Entity\PaymentInterface $payment */
     $payment = Payment::load(1);
-    $this->assertEquals($payment->getOrderId(), $this->order->id());
-    $this->assertEquals($payment->getAmount()->getNumber(), '100');
+    $this->assertEquals($this->order->id(), $payment->getOrderId());
+    $this->assertEquals('100.00', $payment->getAmount()->getNumber());
     $this->assertNotEmpty($payment->getCompletedTime());
   }
 
diff --git a/modules/payment/tests/src/Functional/ManualPaymentAdminTest.php b/modules/payment/tests/src/Functional/ManualPaymentAdminTest.php
index 35b1e523..41daca79 100644
--- a/modules/payment/tests/src/Functional/ManualPaymentAdminTest.php
+++ b/modules/payment/tests/src/Functional/ManualPaymentAdminTest.php
@@ -114,9 +114,9 @@ class ManualPaymentAdminTest extends CommerceBrowserTestBase {
     \Drupal::entityTypeManager()->getStorage('commerce_payment')->resetCache([1]);
     /** @var \Drupal\commerce_payment\Entity\PaymentInterface $payment */
     $payment = Payment::load(1);
-    $this->assertEquals($payment->getOrderId(), $this->order->id());
-    $this->assertEquals($payment->getAmount()->getNumber(), '100');
-    $this->assertEquals($payment->getState()->getLabel(), 'Pending');
+    $this->assertEquals($this->order->id(), $payment->getOrderId());
+    $this->assertEquals('100.00', $payment->getAmount()->getNumber());
+    $this->assertEquals('Pending', $payment->getState()->getLabel());
 
     $this->drupalGet($this->paymentUri . '/add');
     $this->assertSession()->pageTextContains('Manual example');
@@ -128,9 +128,9 @@ class ManualPaymentAdminTest extends CommerceBrowserTestBase {
     \Drupal::entityTypeManager()->getStorage('commerce_payment')->resetCache([2]);
     /** @var \Drupal\commerce_payment\Entity\PaymentInterface $payment */
     $payment = Payment::load(2);
-    $this->assertEquals($payment->getOrderId(), $this->order->id());
-    $this->assertEquals($payment->getAmount()->getNumber(), '100');
-    $this->assertEquals($payment->getState()->getLabel(), 'Completed');
+    $this->assertEquals($this->order->id(), $payment->getOrderId());
+    $this->assertEquals('100.00', $payment->getAmount()->getNumber());
+    $this->assertEquals('Completed', $payment->getState()->getLabel());
     $this->assertNotEmpty($payment->getCompletedTime());
   }
 
diff --git a/modules/price/src/Comparator/PriceComparator.php b/modules/price/src/Comparator/PriceComparator.php
new file mode 100644
index 00000000..ae26a099
--- /dev/null
+++ b/modules/price/src/Comparator/PriceComparator.php
@@ -0,0 +1,43 @@
+<?php
+
+namespace Drupal\commerce_price\Comparator;
+
+use Drupal\commerce_price\Price;
+use SebastianBergmann\Comparator\Comparator;
+use SebastianBergmann\Comparator\ComparisonFailure;
+
+/**
+ * Provides a Comparator for price objects.
+ */
+class PriceComparator extends Comparator {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function accepts($expected, $actual) {
+    return $expected instanceof Price && $actual instanceof Price;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function assertEquals($expected, $actual, $delta = 0.0, $canonicalize = FALSE, $ignoreCase = FALSE) {
+    assert($expected instanceof Price);
+    assert($actual instanceof Price);
+    if (!$actual->equals($expected)) {
+      throw new ComparisonFailure(
+        $expected,
+        $actual,
+        (string) $expected,
+        (string) $actual,
+        FALSE,
+        \sprintf(
+          'Failed asserting that Price %s matches expected %s.',
+          $actual,
+          $expected
+        )
+      );
+    }
+  }
+
+}
diff --git a/modules/product/tests/src/Functional/ProductAdminTest.php b/modules/product/tests/src/Functional/ProductAdminTest.php
index 6923de84..3e464b10 100644
--- a/modules/product/tests/src/Functional/ProductAdminTest.php
+++ b/modules/product/tests/src/Functional/ProductAdminTest.php
@@ -351,8 +351,8 @@ class ProductAdminTest extends ProductBrowserTestBase {
 
     $this->container->get('entity_type.manager')->getStorage('commerce_product_variation')->resetCache([$variation->id()]);
     $variation = ProductVariation::load($variation->id());
-    $this->assertEquals($variation->getSku(), $new_sku);
-    $this->assertEquals($variation->getPrice()->getNumber(), $new_price_amount);
+    $this->assertEquals($new_sku, $variation->getSku());
+    $this->assertEquals($new_price_amount, $variation->getPrice()->getNumber());
   }
 
   /**
@@ -395,8 +395,8 @@ class ProductAdminTest extends ProductBrowserTestBase {
 
     $expected_variation_id = $variation->id() + 1;
     $variation = ProductVariation::load($expected_variation_id);
-    $this->assertEquals($variation->getSku(), $new_sku);
-    $this->assertEquals($variation->getPrice()->getNumber(), '12.00');
+    $this->assertEquals($new_sku, $variation->getSku());
+    $this->assertEquals('12.00', $variation->getPrice()->getNumber());
     $this->assertTrue($variation->isPublished());
   }
 
diff --git a/tests/src/Functional/CommerceBrowserTestBase.php b/tests/src/Functional/CommerceBrowserTestBase.php
index 56bf4551..0b59478b 100644
--- a/tests/src/Functional/CommerceBrowserTestBase.php
+++ b/tests/src/Functional/CommerceBrowserTestBase.php
@@ -2,11 +2,13 @@
 
 namespace Drupal\Tests\commerce\Functional;
 
+use Drupal\commerce_price\Comparator\PriceComparator;
 use Drupal\commerce_store\StoreCreationTrait;
 use Drupal\Tests\block\Traits\BlockCreationTrait;
 use Drupal\Tests\BrowserTestBase;
 use Drupal\Tests\commerce\Traits\CommerceBrowserTestTrait;
 use Drupal\Tests\commerce\Traits\DeprecationSuppressionTrait;
+use SebastianBergmann\Comparator\Factory as PhpUnitComparatorFactory;
 
 /**
  * Provides a base class for Commerce functional tests.
@@ -56,6 +58,8 @@ abstract class CommerceBrowserTestBase extends BrowserTestBase {
     $this->setErrorHandler();
     parent::setUp();
 
+    PhpUnitComparatorFactory::getInstance()->register(new PriceComparator());
+
     $this->store = $this->createStore();
     $this->placeBlock('local_tasks_block');
     $this->placeBlock('local_actions_block');
diff --git a/tests/src/FunctionalJavascript/CommerceWebDriverTestBase.php b/tests/src/FunctionalJavascript/CommerceWebDriverTestBase.php
index 10c055ea..afe963ba 100644
--- a/tests/src/FunctionalJavascript/CommerceWebDriverTestBase.php
+++ b/tests/src/FunctionalJavascript/CommerceWebDriverTestBase.php
@@ -2,11 +2,13 @@
 
 namespace Drupal\Tests\commerce\FunctionalJavascript;
 
+use Drupal\commerce_price\Comparator\PriceComparator;
 use Drupal\commerce_store\StoreCreationTrait;
 use Drupal\FunctionalJavascriptTests\JSWebAssert;
 use Drupal\FunctionalJavascriptTests\WebDriverTestBase;
 use Drupal\Tests\block\Traits\BlockCreationTrait;
 use Drupal\Tests\commerce\Traits\CommerceBrowserTestTrait;
+use SebastianBergmann\Comparator\Factory as PhpUnitComparatorFactory;
 
 /**
  * Provides a base class for Commerce functional tests.
@@ -61,6 +63,8 @@ abstract class CommerceWebDriverTestBase extends WebDriverTestBase {
   protected function setUp() {
     parent::setUp();
 
+    PhpUnitComparatorFactory::getInstance()->register(new PriceComparator());
+
     $this->store = $this->createStore();
     $this->placeBlock('local_tasks_block');
     $this->placeBlock('local_actions_block');
diff --git a/tests/src/Kernel/CommerceKernelTestBase.php b/tests/src/Kernel/CommerceKernelTestBase.php
index 4cdcb7d3..efda5e8c 100644
--- a/tests/src/Kernel/CommerceKernelTestBase.php
+++ b/tests/src/Kernel/CommerceKernelTestBase.php
@@ -2,9 +2,11 @@
 
 namespace Drupal\Tests\commerce\Kernel;
 
+use Drupal\commerce_price\Comparator\PriceComparator;
 use Drupal\commerce_store\StoreCreationTrait;
 use Drupal\KernelTests\Core\Entity\EntityKernelTestBase;
 use Drupal\Tests\commerce\Traits\DeprecationSuppressionTrait;
+use SebastianBergmann\Comparator\Factory as PhpUnitComparatorFactory;
 
 /**
  * Provides a base class for Commerce kernel tests.
@@ -47,7 +49,9 @@ abstract class CommerceKernelTestBase extends EntityKernelTestBase {
    */
   protected function setUp() {
     parent::setUp();
+
     $this->setErrorHandler();
+    PhpUnitComparatorFactory::getInstance()->register(new PriceComparator());
 
     if (\Drupal::entityTypeManager()->hasDefinition('path_alias')) {
       $this->installEntitySchema('path_alias');