diff --git a/packages/block-library/src/column/edit.js b/packages/block-library/src/column/edit.js
index 9103299ddf5e0c..5b45370e9111d0 100644
--- a/packages/block-library/src/column/edit.js
+++ b/packages/block-library/src/column/edit.js
@@ -70,7 +70,6 @@ function ColumnEdit( {
 				tagName={ Block.div }
 				className={ classes }
 				style={ hasWidth ? { flexBasis: width + '%' } : undefined }
-				data-has-explicit-width={ hasWidth }
 			/>
 		</>
 	);
diff --git a/packages/block-library/src/columns/style.scss b/packages/block-library/src/columns/style.scss
index 9abb98832df8ea..1122cd6661dfac 100644
--- a/packages/block-library/src/columns/style.scss
+++ b/packages/block-library/src/columns/style.scss
@@ -56,7 +56,7 @@
 
 		// Columns with an explicitly-assigned width should maintain their
 		// `flex-basis` width and not grow.
-		&[style] {
+		&[style*="flex-basis"] {
 			flex-grow: 0;
 		}