diff --git a/packages/compiler/src/shadow_css.ts b/packages/compiler/src/shadow_css.ts
index cadfaf55e85..93c174b5e6b 100644
--- a/packages/compiler/src/shadow_css.ts
+++ b/packages/compiler/src/shadow_css.ts
@@ -186,7 +186,7 @@ export class ShadowCss {
         // Replace non hash comments with empty lines.
         // This is done so that we do not leak any sensitive data in comments.
         const newLinesMatches = m.match(_newLinesRe);
-        comments.push((newLinesMatches?.join('') ?? '') + '\n');
+        comments.push(newLinesMatches?.join('') ?? '');
       }
 
       return COMMENT_PLACEHOLDER;
diff --git a/packages/compiler/test/shadow_css/shadow_css_spec.ts b/packages/compiler/test/shadow_css/shadow_css_spec.ts
index 89b1a74efda..d9c2893c3bb 100644
--- a/packages/compiler/test/shadow_css/shadow_css_spec.ts
+++ b/packages/compiler/test/shadow_css/shadow_css_spec.ts
@@ -368,17 +368,17 @@ describe('ShadowCss', () => {
   describe('comments', () => {
     // Comments should be kept in the same position as otherwise inline sourcemaps break due to
     // shift in lines.
-    it('should replace multiline comments with newline', () => {
-      expect(shim('/* b {c} */ b {c}', 'contenta')).toBe('\n b[contenta] {c}');
+    it('should remove inline comments without adding extra lines', () => {
+      expect(shim('/* b {c} */ b {c}', 'contenta')).toBe(' b[contenta] {c}');
     });
 
-    it('should replace multiline comments with newline in the original position', () => {
-      expect(shim('/* b {c}\n */ b {c}', 'contenta')).toBe('\n\n b[contenta] {c}');
+    it('should preserve internal newlines from multiline comments', () => {
+      expect(shim('/* b {c}\n */ b {c}', 'contenta')).toBe('\n b[contenta] {c}');
     });
 
-    it('should replace comments with newline in the original position', () => {
+    it('should remove multiple inline comments without adding extra lines', () => {
       expect(shim('/* b {c} */ b {c} /* a {c} */ a {c}', 'contenta')).toBe(
-        '\n b[contenta] {c} \n a[contenta] {c}',
+        ' b[contenta] {c}  a[contenta] {c}',
       );
     });
 
@@ -392,9 +392,7 @@ describe('ShadowCss', () => {
     });
 
     it('should handle adjacent comments', () => {
-      expect(shim('/* comment 1 */ /* comment 2 */ b {c}', 'contenta')).toBe(
-        '\n \n b[contenta] {c}',
-      );
+      expect(shim('/* comment 1 */ /* comment 2 */ b {c}', 'contenta')).toBe('  b[contenta] {c}');
     });
   });
 });