diff --git a/packages/astro/src/assets/services/sharp.ts b/packages/astro/src/assets/services/sharp.ts
index 857d35442feb..ccc909b68f6c 100644
--- a/packages/astro/src/assets/services/sharp.ts
+++ b/packages/astro/src/assets/services/sharp.ts
@@ -71,32 +71,29 @@ const sharpService: LocalImageService<SharpImageServiceConfig> = {
 		// always call rotate to adjust for EXIF data orientation
 		result.rotate();
 
-		// If `fit` isn't set then use old behavior:
-		// - Do not use both width and height for resizing, and prioritize width over height
-		// - Allow enlarging images
+		if (transform.width && transform.height) {
+			const fit: keyof FitEnum | undefined = transform.fit
+				? (fitMap[transform.fit] ?? 'inside')
+				: undefined;
 
-		const withoutEnlargement = Boolean(transform.fit);
-		if (transform.width && transform.height && transform.fit) {
-			const fit: keyof FitEnum = fitMap[transform.fit] ?? 'inside';
 			result.resize({
 				width: Math.round(transform.width),
 				height: Math.round(transform.height),
 				fit,
 				position: transform.position,
-				withoutEnlargement,
+				withoutEnlargement: true,
 			});
 		} else if (transform.height && !transform.width) {
 			result.resize({
 				height: Math.round(transform.height),
-				withoutEnlargement,
+				withoutEnlargement: true,
 			});
 		} else if (transform.width) {
 			result.resize({
 				width: Math.round(transform.width),
-				withoutEnlargement,
+				withoutEnlargement: true,
 			});
 		}
-
 		if (transform.format) {
 			let quality: number | string | undefined = undefined;
 			if (transform.quality) {
diff --git a/packages/astro/test/core-image-service.test.js b/packages/astro/test/core-image-service.test.js
index 0c75ed484f69..60b04a1762ef 100644
--- a/packages/astro/test/core-image-service.test.js
+++ b/packages/astro/test/core-image-service.test.js
@@ -111,19 +111,17 @@ describe('astro image service', () => {
 				assert.equal(height, originalHeight);
 			});
 
-			// To match old behavior, we should upscale if the requested size is larger than the original
-			it('does upscale image if requested size is larger than original and fit is unset', async () => {
+			it('does not upscale image if requested size is larger than original and fit is unset', async () => {
 				const url = new URL(src);
 				url.searchParams.set('w', '3000');
 				url.searchParams.set('h', '2000');
 				url.searchParams.delete('fit');
 				const { width, height } = await getImageDimensionsFromFixture(fixture, url);
-				assert.equal(width, 3000);
-				assert.equal(height, 2000);
+				assert.equal(width, originalWidth);
+				assert.equal(height, originalHeight);
 			});
 
-			// To match old behavior, we should upscale if the requested size is larger than the original
-			it('does not upscale is only one dimension is provided and fit is set', async () => {
+			it('does not upscale if only one dimension is provided and fit is set', async () => {
 				const url = new URL(src);
 				url.searchParams.set('w', '3000');
 				url.searchParams.delete('h');