diff --git a/core/modules/layout_builder/tests/src/FunctionalJavascript/InlineBlockTest.php b/core/modules/layout_builder/tests/src/FunctionalJavascript/InlineBlockTest.php
index e3407a7ff4..90d28224ab 100644
--- a/core/modules/layout_builder/tests/src/FunctionalJavascript/InlineBlockTest.php
+++ b/core/modules/layout_builder/tests/src/FunctionalJavascript/InlineBlockTest.php
@@ -286,6 +286,8 @@ public function testInlineBlocksRevisioningIntegrity() {
     $this->addInlineBlockToLayout('Block 2', 'Block 2 original');
     $this->assertSaveLayout();
     $this->assertNodeRevisionContent(3, ['Block 1 original', 'Block 2 original']);
+    $this->assertBlockRevisionCountByTitle('Block 1', 1);
+    $this->assertBlockRevisionCountByTitle('Block 2', 1);
 
     // Update the contents of one of the blocks and assert the updated content
     // appears on the next revision.
@@ -293,6 +295,8 @@ public function testInlineBlocksRevisioningIntegrity() {
     $this->configureInlineBlock('Block 2 original', 'Block 2 updated', $block_2_locator);
     $this->assertSaveLayout();
     $this->assertNodeRevisionContent(4, ['Block 1 original', 'Block 2 updated']);
+    $this->assertBlockRevisionCountByTitle('Block 1', 1);
+    $this->assertBlockRevisionCountByTitle('Block 2', 2);
 
     // Update block 1 without creating a new revision of the parent.
     $this->drupalGet('node/1/layout');
@@ -301,6 +305,8 @@ public function testInlineBlocksRevisioningIntegrity() {
     $this->getSession()->getPage()->pressButton('Save layout');
     $this->assertNotEmpty($this->assertSession()->waitForElement('css', '.messages--status'));
     $this->assertNodeRevisionContent(4, ['Block 1 updated', 'Block 2 updated']);
+    $this->assertBlockRevisionCountByTitle('Block 1', 2);
+    $this->assertBlockRevisionCountByTitle('Block 2', 2);
 
     // Reassert all of the parent revisions contain the correct block content
     // and the integrity of the revisions was preserved.
@@ -323,6 +329,23 @@ protected function assertNodeRevisionContent($revision_id, array $content) {
     }
   }
 
+  /**
+   * Assert the number of block content revisions by the block title.
+   *
+   * @param string $block_title
+   *   The block title.
+   * @param int $expected_revision_count
+   *   The revision count.
+   */
+  protected function assertBlockRevisionCountByTitle($block_title, $expected_revision_count) {
+    $actual_revision_count = $this->blockStorage->getQuery()
+      ->condition('info', $block_title)
+      ->allRevisions()
+      ->count()
+      ->execute();
+    $this->assertEquals($actual_revision_count, $expected_revision_count);
+  }
+
   /**
    * Tests that entity blocks deleted correctly.
    */