diff --git a/pkg/dev_compiler/tool/dart2js_nnbd_sdk_error_golden.txt b/pkg/dev_compiler/tool/dart2js_nnbd_sdk_error_golden.txt
index c20ae4132b8..7bde8a216cf 100644
--- a/pkg/dev_compiler/tool/dart2js_nnbd_sdk_error_golden.txt
+++ b/pkg/dev_compiler/tool/dart2js_nnbd_sdk_error_golden.txt
@@ -15,5 +15,4 @@ WARNING|STATIC_WARNING|DEAD_NULL_COALESCE|lib/_http/http.dart|1476|39|5|The left
 WARNING|STATIC_WARNING|DEAD_NULL_COALESCE|lib/_http/http.dart|8384|60|5|The left operand can't be null, so the right operand is never executed.
 WARNING|STATIC_WARNING|DEAD_NULL_COALESCE|lib/_http/http.dart|9311|54|5|The left operand can't be null, so the right operand is never executed.
 WARNING|STATIC_WARNING|DEAD_NULL_COALESCE|lib/developer/developer.dart|315|25|23|The left operand can't be null, so the right operand is never executed.
-WARNING|STATIC_WARNING|DEAD_NULL_COALESCE|lib/html/dart2js/html_dart2js.dart|4076|25|2|The left operand can't be null, so the right operand is never executed.
 WARNING|STATIC_WARNING|DEAD_NULL_COALESCE|lib/io/io.dart|9167|16|1|The left operand can't be null, so the right operand is never executed.
diff --git a/pkg/dev_compiler/tool/dartdevc_nnbd_sdk_error_golden.txt b/pkg/dev_compiler/tool/dartdevc_nnbd_sdk_error_golden.txt
index ccf9e8ec1f9..3bce22d9020 100644
--- a/pkg/dev_compiler/tool/dartdevc_nnbd_sdk_error_golden.txt
+++ b/pkg/dev_compiler/tool/dartdevc_nnbd_sdk_error_golden.txt
@@ -20,5 +20,4 @@ WARNING|STATIC_WARNING|DEAD_NULL_COALESCE|lib/_http/http.dart|8384|60|5|The left
 WARNING|STATIC_WARNING|DEAD_NULL_COALESCE|lib/_http/http.dart|9311|54|5|The left operand can't be null, so the right operand is never executed.
 WARNING|STATIC_WARNING|DEAD_NULL_COALESCE|lib/collection/collection.dart|1076|46|13|The left operand can't be null, so the right operand is never executed.
 WARNING|STATIC_WARNING|DEAD_NULL_COALESCE|lib/developer/developer.dart|332|25|23|The left operand can't be null, so the right operand is never executed.
-WARNING|STATIC_WARNING|DEAD_NULL_COALESCE|lib/html/dart2js/html_dart2js.dart|4076|25|2|The left operand can't be null, so the right operand is never executed.
 WARNING|STATIC_WARNING|DEAD_NULL_COALESCE|lib/io/io.dart|9167|16|1|The left operand can't be null, so the right operand is never executed.
diff --git a/sdk/lib/html/dart2js/html_dart2js.dart b/sdk/lib/html/dart2js/html_dart2js.dart
index e07517dae1a..da0e03f1c25 100644
--- a/sdk/lib/html/dart2js/html_dart2js.dart
+++ b/sdk/lib/html/dart2js/html_dart2js.dart
@@ -3685,8 +3685,7 @@ class CssStyleDeclaration extends Interceptor with CssStyleDeclarationBase {
   ///
   /// Please note the property name uses camelCase, not-hyphens.
   String getPropertyValue(String propertyName) {
-    var propValue = _getPropertyValueHelper(propertyName);
-    return propValue ?? '';
+    return _getPropertyValueHelper(propertyName);
   }
 
   String _getPropertyValueHelper(String propertyName) {
diff --git a/sdk_nnbd/lib/html/dart2js/html_dart2js.dart b/sdk_nnbd/lib/html/dart2js/html_dart2js.dart
index a69ece661e5..5ace01aa3a6 100644
--- a/sdk_nnbd/lib/html/dart2js/html_dart2js.dart
+++ b/sdk_nnbd/lib/html/dart2js/html_dart2js.dart
@@ -4072,8 +4072,7 @@ class CssStyleDeclaration extends Interceptor with CssStyleDeclarationBase {
   ///
   /// Please note the property name uses camelCase, not-hyphens.
   String getPropertyValue(String propertyName) {
-    var propValue = _getPropertyValueHelper(propertyName);
-    return propValue ?? '';
+    return _getPropertyValueHelper(propertyName);
   }
 
   String _getPropertyValueHelper(String propertyName) {
diff --git a/tools/dom/scripts/css_code_generator.py b/tools/dom/scripts/css_code_generator.py
index 9e71e694c25..8910ed1e919 100644
--- a/tools/dom/scripts/css_code_generator.py
+++ b/tools/dom/scripts/css_code_generator.py
@@ -125,8 +125,7 @@ $(ANNOTATIONS)$(NATIVESPEC)$(CLASS_MODIFIERS)class $CLASSNAME $EXTENDS with
   ///
   /// Please note the property name uses camelCase, not-hyphens.
   String getPropertyValue(String propertyName) {
-    var propValue = _getPropertyValueHelper(propertyName);
-    return propValue ?? '';
+    return _getPropertyValueHelper(propertyName);
   }
 
   String _getPropertyValueHelper(String propertyName) {
diff --git a/tools/dom/templates/html/impl/impl_CSSStyleDeclaration.darttemplate b/tools/dom/templates/html/impl/impl_CSSStyleDeclaration.darttemplate
index 6edac30e7f2..5359faa58a1 100644
--- a/tools/dom/templates/html/impl/impl_CSSStyleDeclaration.darttemplate
+++ b/tools/dom/templates/html/impl/impl_CSSStyleDeclaration.darttemplate
@@ -27,8 +27,7 @@ $(ANNOTATIONS)$(NATIVESPEC)$(CLASS_MODIFIERS)class $CLASSNAME $EXTENDS with
   ///
   /// Please note the property name uses camelCase, not-hyphens.
   String getPropertyValue(String propertyName) {
-    var propValue = _getPropertyValueHelper(propertyName);
-    return propValue ?? '';
+    return _getPropertyValueHelper(propertyName);
   }
 
   String _getPropertyValueHelper(String propertyName) {