diff --git a/engine/src/flutter/tests/layout/document-elementFromPoint.sky b/engine/src/flutter/tests/layout/document-elementFromPoint.sky
index 68c0125b9f..461b782d09 100644
--- a/engine/src/flutter/tests/layout/document-elementFromPoint.sky
+++ b/engine/src/flutter/tests/layout/document-elementFromPoint.sky
@@ -47,12 +47,12 @@ void main() {
   });
 
   test("should hit test child with layered parent", () {
-    document.querySelector('parent').style.setProperty("transform", "translate3d(0, 0, 0)");
+    document.querySelector('parent').style["transform"] = "translate3d(0, 0, 0)";
     hitTestWithChildren();
   });
 
   test("should hit test transformed child", () {
-    document.querySelector('child').style.setProperty("transform", "translate3d(100px, 0, 0)");
+    document.querySelector('child').style["transform"] = "translate3d(100px, 0, 0)";
     expect(document.elementFromPoint(50, 210).tagName, equals('parent'));
     expect(document.elementFromPoint(150, 210).tagName, equals('child'));
   });
diff --git a/engine/src/flutter/tests/lowlevel/bug-438036.sky b/engine/src/flutter/tests/lowlevel/bug-438036.sky
index a92954aa8c..53f5751468 100644
--- a/engine/src/flutter/tests/lowlevel/bug-438036.sky
+++ b/engine/src/flutter/tests/lowlevel/bug-438036.sky
@@ -19,7 +19,7 @@ void main() {
     var target = document.querySelector('div');
 
     target.classList.add("wide");
-    expect(window.getComputedStyle(target).getPropertyValue("width"),
+    expect(window.getComputedStyle(target)["width"],
            equals("200px"));
   });
 
@@ -27,7 +27,7 @@ void main() {
     var target = document.querySelectorAll('div')[1];
 
     target.setAttribute("id", "high");
-    expect(window.getComputedStyle(target).getPropertyValue("height"),
+    expect(window.getComputedStyle(target)["height"],
            equals("200px"));
   });
 }
diff --git a/engine/src/flutter/tests/lowlevel/classlist.sky b/engine/src/flutter/tests/lowlevel/classlist.sky
index 98fe3a5c05..2ebf68462a 100644
--- a/engine/src/flutter/tests/lowlevel/classlist.sky
+++ b/engine/src/flutter/tests/lowlevel/classlist.sky
@@ -102,23 +102,23 @@ main() {
   });
 
   test("should dynamically update style", () {
-    expect(window.getComputedStyle(target).getPropertyValue("font-size"),
+    expect(window.getComputedStyle(target)["font-size"],
            equals("5px"));
     target.classList.add("font-10");
     target.classList.add("font-12");
-    expect(window.getComputedStyle(target).getPropertyValue("font-size"),
+    expect(window.getComputedStyle(target)["font-size"],
            equals("12px"));
     target.classList.add("font-24");
-    expect(window.getComputedStyle(target).getPropertyValue("font-size"),
+    expect(window.getComputedStyle(target)["font-size"],
            equals("24px"));
     target.classList.remove("font-12");
-    expect(window.getComputedStyle(target).getPropertyValue("font-size"),
+    expect(window.getComputedStyle(target)["font-size"],
            equals("24px"));
     target.classList.remove("font-24");
-    expect(window.getComputedStyle(target).getPropertyValue("font-size"),
+    expect(window.getComputedStyle(target)["font-size"],
            equals("10px"));
     target.classList.remove("font-10");
-    expect(window.getComputedStyle(target).getPropertyValue("font-size"),
+    expect(window.getComputedStyle(target)["font-size"],
            equals("5px"));
   });
 }
diff --git a/engine/src/flutter/tests/lowlevel/style-basic.sky b/engine/src/flutter/tests/lowlevel/style-basic.sky
index fdf6b93168..9c08c714d9 100644
--- a/engine/src/flutter/tests/lowlevel/style-basic.sky
+++ b/engine/src/flutter/tests/lowlevel/style-basic.sky
@@ -27,7 +27,7 @@
         var log = document.getElementById("log");
         var i = 1;
         for (Element element = tests.firstElementChild; element != null; element = element.nextElementSibling) {
-            var order = int.parse(window.getComputedStyle(element).getPropertyValue("order"));
+            var order = int.parse(window.getComputedStyle(element)["order"]);
             var div = document.createElement("div");
             var text = (order == i) ? "PASS" : "FAIL";
             text += ": <"
diff --git a/engine/src/flutter/tests/lowlevel/style-specificity.sky b/engine/src/flutter/tests/lowlevel/style-specificity.sky
index 2aebe9ebf8..e8fee0ea43 100644
--- a/engine/src/flutter/tests/lowlevel/style-specificity.sky
+++ b/engine/src/flutter/tests/lowlevel/style-specificity.sky
@@ -16,7 +16,7 @@
 
       test('should not exist', () {
         var sandbox = document.getElementById("sandbox");
-        expect(window.getComputedStyle(sandbox).getPropertyValue("color"),
+        expect(window.getComputedStyle(sandbox)["color"],
                equals("rgb(0, 0, 255)"));
       });
     }
diff --git a/engine/src/flutter/tests/styles/border-parsing.sky b/engine/src/flutter/tests/styles/border-parsing.sky
index 8f00996bbe..79bf1bb31a 100644
--- a/engine/src/flutter/tests/styles/border-parsing.sky
+++ b/engine/src/flutter/tests/styles/border-parsing.sky
@@ -12,7 +12,7 @@ void main() {
   test('should render', () {
     var foo = document.querySelector('foo');
     foo.setAttribute('style', 'border: 1px solid red');
-    expect(foo.style.getPropertyValue("border"), equals('1px solid rgb(255, 0, 0)'));
+    expect(foo.style["border"], equals('1px solid rgb(255, 0, 0)'));
   });
 }
 </script>
diff --git a/engine/src/flutter/tests/styles/inline-style.sky b/engine/src/flutter/tests/styles/inline-style.sky
index fb1a5d1b3e..65091ba5b3 100644
--- a/engine/src/flutter/tests/styles/inline-style.sky
+++ b/engine/src/flutter/tests/styles/inline-style.sky
@@ -15,9 +15,8 @@ void main() {
 
 
     expect(foo.getAttribute('style'), equals('color: red'));
-    expect(foo.style.getPropertyValue("color"), equals('rgb(255, 0, 0)'));
-    expect(window.getComputedStyle(foo).getPropertyValue("color"),
-           equals('rgb(255, 0, 0)'));
+    expect(foo.style["color"], equals('rgb(255, 0, 0)'));
+    expect(window.getComputedStyle(foo)["color"], equals('rgb(255, 0, 0)'));
   });
 }
 </script>
diff --git a/engine/src/flutter/tests/styles/media-queries.sky b/engine/src/flutter/tests/styles/media-queries.sky
index ff4f618738..9938e9b1ba 100644
--- a/engine/src/flutter/tests/styles/media-queries.sky
+++ b/engine/src/flutter/tests/styles/media-queries.sky
@@ -22,14 +22,12 @@ void main() {
 
   test('should allow sheets to apply when they match', () {
     var element = document.getElementById('matches');
-    expect(window.getComputedStyle(element).getPropertyValue("color"),
-           equals("rgb(255, 0, 0)"));
+    expect(window.getComputedStyle(element)["color"], equals("rgb(255, 0, 0)"));
   });
 
   test('should cause sheets to be skipped when they do not match', () {
     var element = document.getElementById('does-not-match');
-    expect(window.getComputedStyle(element).getPropertyValue("color"),
-           "rgb(0, 0, 0)");
+    expect(window.getComputedStyle(element)["color"], equals("rgb(0, 0, 0)"));
   });
 }
 </script>