diff --git a/packages/block-editor/src/components/alignment-control/test/index.js b/packages/block-editor/src/components/alignment-control/test/index.js
index 14f0d9a04e033c..c792b3e9b7f82b 100644
--- a/packages/block-editor/src/components/alignment-control/test/index.js
+++ b/packages/block-editor/src/components/alignment-control/test/index.js
@@ -52,7 +52,7 @@ describe( 'AlignmentUI', () => {
 			advanceTimers: jest.advanceTimersByTime,
 		} );
 
-		render(
+		const { unmount } = render(
 			<AlignmentUI
 				isToolbar
 				value={ alignment }
@@ -77,6 +77,9 @@ describe( 'AlignmentUI', () => {
 				name: /^Align text \w+$/,
 			} )
 		).toHaveLength( 3 );
+
+		// Cancel running effects, like delayed dropdown menu popover positioning.
+		unmount();
 	} );
 
 	test( 'should call on change with undefined when a control is already active', async () => {
diff --git a/packages/block-editor/src/components/block-alignment-control/test/index.js b/packages/block-editor/src/components/block-alignment-control/test/index.js
index fd9f0f782e25d2..abf2a0a7c448ae 100644
--- a/packages/block-editor/src/components/block-alignment-control/test/index.js
+++ b/packages/block-editor/src/components/block-alignment-control/test/index.js
@@ -47,7 +47,7 @@ describe( 'BlockAlignmentUI', () => {
 			advanceTimers: jest.advanceTimersByTime,
 		} );
 
-		render(
+		const { unmount } = render(
 			<BlockAlignmentUI
 				value={ alignment }
 				onChange={ onChange }
@@ -72,6 +72,9 @@ describe( 'BlockAlignmentUI', () => {
 				name: /^Align \w+$/,
 			} )
 		).toHaveLength( 3 );
+
+		// Cancel running effects, like delayed dropdown menu popover positioning.
+		unmount();
 	} );
 
 	test( 'should call onChange with undefined, when the control is already active', async () => {
diff --git a/packages/block-editor/src/components/block-vertical-alignment-control/test/index.js b/packages/block-editor/src/components/block-vertical-alignment-control/test/index.js
index 2e54ee90268549..f2645357a197c3 100644
--- a/packages/block-editor/src/components/block-vertical-alignment-control/test/index.js
+++ b/packages/block-editor/src/components/block-vertical-alignment-control/test/index.js
@@ -45,7 +45,7 @@ describe( 'BlockVerticalAlignmentUI', () => {
 			advanceTimers: jest.advanceTimersByTime,
 		} );
 
-		render(
+		const { unmount } = render(
 			<BlockVerticalAlignmentUI
 				isToolbar
 				value={ alignment }
@@ -70,6 +70,9 @@ describe( 'BlockVerticalAlignmentUI', () => {
 				name: /^Align \w+$/,
 			} )
 		).toHaveLength( 3 );
+
+		// Cancel running effects, like delayed dropdown menu popover positioning.
+		unmount();
 	} );
 
 	it( 'should call onChange with undefined, when the control is already active', async () => {