diff --git a/test/staging/sm/extensions/dataview.js b/test/staging/sm/extensions/dataview.js
index 0fba1559c5..d01fe819aa 100644
--- a/test/staging/sm/extensions/dataview.js
+++ b/test/staging/sm/extensions/dataview.js
@@ -4,8 +4,6 @@
  */
 
 /*---
-flags:
-  - noStrict
 description: |
   DataView tests
 esid: pending
@@ -33,7 +31,7 @@ function test(sharedMem) {
     }
 
     // testConstructor
-    buffer = bufferize(new Uint8Array([1, 2]));
+    var buffer = bufferize(new Uint8Array([1, 2]));
     checkThrow(() => new DataView(buffer, 0, 3), RangeError);
     checkThrow(() => new DataView(buffer, 1, 2), RangeError);
     checkThrow(() => new DataView(buffer, 2, 1), RangeError);
@@ -49,7 +47,7 @@ function test(sharedMem) {
     var data1_r = data1.slice().reverse();
     var buffer1 = bufferize(new Uint8Array(data1));
     var view1 = new DataView(buffer1, 0, 16);
-    view = view1;
+    var view = view1;
     assert.sameValue(view.getInt8(0), 0);
     assert.sameValue(view.getInt8(8), -128);
     assert.sameValue(view.getInt8(15), -1);
diff --git a/test/staging/sm/extensions/regress-480579.js b/test/staging/sm/extensions/regress-480579.js
index 46827c6488..85e013dbe5 100644
--- a/test/staging/sm/extensions/regress-480579.js
+++ b/test/staging/sm/extensions/regress-480579.js
@@ -4,8 +4,6 @@
  */
 
 /*---
-flags:
-  - noStrict
 description: |
   Do not assert: pobj_ == obj2
 esid: pending
@@ -20,10 +18,10 @@ function test()
 {
   expect = '12';
 
-  a = {x: 1};
-  b = {__proto__: a};
-  c = {__proto__: b};
-  for (i = 0; i < 2; i++) {
+  var a = {x: 1};
+  var b = {__proto__: a};
+  var c = {__proto__: b};
+  for (var i = 0; i < 2; i++) {
     actual += c.x;
     b.x = 2;
   }
diff --git a/test/staging/sm/extensions/regress-481516.js b/test/staging/sm/extensions/regress-481516.js
index 5ff7354702..82f1b640ee 100644
--- a/test/staging/sm/extensions/regress-481516.js
+++ b/test/staging/sm/extensions/regress-481516.js
@@ -4,8 +4,6 @@
  */
 
 /*---
-flags:
-  - noStrict
 description: |
   pobj_ == obj2
 esid: pending
@@ -20,12 +18,12 @@ function test()
 {
   expect = '1111222';
 
-  a = {x: 1};
-  b = {__proto__: a};
-  c = {__proto__: b};
-  objs = [{__proto__: a}, {__proto__: a}, {__proto__: a}, b, {__proto__: a},
+  var a = {x: 1};
+  var b = {__proto__: a};
+  var c = {__proto__: b};
+  var objs = [{__proto__: a}, {__proto__: a}, {__proto__: a}, b, {__proto__: a},
           {__proto__: a}];
-  for (i = 0; i < 6; i++) {
+  for (var i = 0; i < 6; i++) {
     actual += ""+c.x;
     objs[i].x = 2;
   }