diff --git a/test/staging/sm/expressions/destructuring-array-lexical.js b/test/staging/sm/expressions/destructuring-array-lexical.js
index 710ec6d252..713aa8077a 100644
--- a/test/staging/sm/expressions/destructuring-array-lexical.js
+++ b/test/staging/sm/expressions/destructuring-array-lexical.js
@@ -14,8 +14,6 @@ var summary = "Array destructuring with accessing uninitialized lexical binding.
 
 print(BUGNUMBER + ": " + summary);
 
-assertThrowsInstanceOf(() => { let y = [y] = []; },
-                       ReferenceError);
-assertThrowsInstanceOf(() => { let y = [y] = [,]; },
-                       ReferenceError);
+assert.throws(ReferenceError, () => { let y = [y] = []; });
+assert.throws(ReferenceError, () => { let y = [y] = [,]; });
 
diff --git a/test/staging/sm/expressions/exponentiation-unparenthesised-unary.js b/test/staging/sm/expressions/exponentiation-unparenthesised-unary.js
index 666772c096..a64064f6fc 100644
--- a/test/staging/sm/expressions/exponentiation-unparenthesised-unary.js
+++ b/test/staging/sm/expressions/exponentiation-unparenthesised-unary.js
@@ -20,8 +20,8 @@ function assertNoError(f, msg) {
 }
 
 function assertSyntaxError(code) {
-  assertThrowsInstanceOf(function () { Function(code); }, SyntaxError, "Function:" + code);
-  assertThrowsInstanceOf(function () { AsyncFunction(code); }, SyntaxError, "AsyncFunction:" + code);
+  assert.throws(SyntaxError, function () { Function(code); }, "Function:" + code);
+  assert.throws(SyntaxError, function () { AsyncFunction(code); }, "AsyncFunction:" + code);
 }
 
 function assertNoSyntaxError(code) {
diff --git a/test/staging/sm/expressions/inNotObjectError.js b/test/staging/sm/expressions/inNotObjectError.js
index 9e21f12857..878c318600 100644
--- a/test/staging/sm/expressions/inNotObjectError.js
+++ b/test/staging/sm/expressions/inNotObjectError.js
@@ -21,21 +21,21 @@ assert.throws(TypeError, () => 'this is subString' in 'this is base');
 assert.throws(TypeError, () => 'HEAD' + 'subString'.repeat(30000) in 'HEAD' + 'base'.repeat(30000));
 
 // These test cases check if it does not crash and throws appropriate error.
-assertThrowsInstanceOf(() => { 1 in 'hello' }, TypeError);
-assertThrowsInstanceOf(() => { 'hello' in 1 }, TypeError);
-assertThrowsInstanceOf(() => { 'hello' in null }, TypeError);
-assertThrowsInstanceOf(() => { null in 'hello' }, TypeError);
-assertThrowsInstanceOf(() => { null in null }, TypeError);
-assertThrowsInstanceOf(() => { 'hello' in true }, TypeError);
-assertThrowsInstanceOf(() => { false in 1.1 }, TypeError);
-assertThrowsInstanceOf(() => { Symbol.iterator in undefined }, TypeError);
-assertThrowsInstanceOf(() => { [] in undefined }, TypeError);
-assertThrowsInstanceOf(() => { /a/ in 'hello' }, TypeError);
+assert.throws(TypeError, () => { 1 in 'hello' });
+assert.throws(TypeError, () => { 'hello' in 1 });
+assert.throws(TypeError, () => { 'hello' in null });
+assert.throws(TypeError, () => { null in 'hello' });
+assert.throws(TypeError, () => { null in null });
+assert.throws(TypeError, () => { 'hello' in true });
+assert.throws(TypeError, () => { false in 1.1 });
+assert.throws(TypeError, () => { Symbol.iterator in undefined });
+assert.throws(TypeError, () => { [] in undefined });
+assert.throws(TypeError, () => { /a/ in 'hello' });
 var str = 'hello';
-assertThrowsInstanceOf(() => { str in 'hello' }, TypeError);
+assert.throws(TypeError, () => { str in 'hello' });
 class A {};
-assertThrowsInstanceOf(() => { new A() in undefined }, TypeError);
+assert.throws(TypeError, () => { new A() in undefined });
 var a = new A();
 a.b = 1.1;
-assertThrowsInstanceOf(() => { a.b in 1.1 }, TypeError);
+assert.throws(TypeError, () => { a.b in 1.1 });
 
diff --git a/test/staging/sm/expressions/optional-chain-tdz.js b/test/staging/sm/expressions/optional-chain-tdz.js
index 864d15dcfe..1d4d77f8fa 100644
--- a/test/staging/sm/expressions/optional-chain-tdz.js
+++ b/test/staging/sm/expressions/optional-chain-tdz.js
@@ -13,25 +13,25 @@ esid: pending
 
 // TDZ for lexical |let| bindings with optional chaining.
 {
-  assertThrowsInstanceOf(() => {
+  assert.throws(ReferenceError, () => {
     const Null = null;
     Null?.[b];
     b = 0;
     let b;
-  }, ReferenceError);
+  });
 
-  assertThrowsInstanceOf(() => {
+  assert.throws(ReferenceError, () => {
     const Null = null;
     Null?.[b]();
     b = 0;
     let b;
-  }, ReferenceError);
+  });
 
-  assertThrowsInstanceOf(() => {
+  assert.throws(ReferenceError, () => {
     const Null = null;
     delete Null?.[b];
     b = 0;
     let b;
-  }, ReferenceError);
+  });
 }
 
diff --git a/test/staging/sm/expressions/short-circuit-compound-assignment-const.js b/test/staging/sm/expressions/short-circuit-compound-assignment-const.js
index 62fd79ea0d..fa1fc7a4ab 100644
--- a/test/staging/sm/expressions/short-circuit-compound-assignment-const.js
+++ b/test/staging/sm/expressions/short-circuit-compound-assignment-const.js
@@ -23,7 +23,7 @@ function notEvaluated() {
   assert.sameValue(a, false);
 
   const b = true;
-  assertThrowsInstanceOf(() => { b &&= 1; }, TypeError);
+  assert.throws(TypeError, () => { b &&= 1; });
   assert.sameValue(b, true);
 }
 
@@ -37,7 +37,7 @@ function notEvaluated() {
 
   let g = function fn() {
     "use strict";
-    assertThrowsInstanceOf(() => { fn &&= 1; }, TypeError);
+    assert.throws(TypeError, () => { fn &&= 1; });
     assert.sameValue(fn, g);
   };
   g();
@@ -50,7 +50,7 @@ function notEvaluated() {
   assert.sameValue(a, true);
 
   const b = false;
-  assertThrowsInstanceOf(() => { b ||= 0; }, TypeError);
+  assert.throws(TypeError, () => { b ||= 0; });
   assert.sameValue(b, false);
 }
 
@@ -77,7 +77,7 @@ function notEvaluated() {
   assert.sameValue(a, true);
 
   const b = null;
-  assertThrowsInstanceOf(() => { b ??= 0; }, TypeError);
+  assert.throws(TypeError, () => { b ??= 0; });
   assert.sameValue(b, null);
 }
 
diff --git a/test/staging/sm/expressions/short-circuit-compound-assignment-tdz.js b/test/staging/sm/expressions/short-circuit-compound-assignment-tdz.js
index b3aa22d20c..0dac21eceb 100644
--- a/test/staging/sm/expressions/short-circuit-compound-assignment-tdz.js
+++ b/test/staging/sm/expressions/short-circuit-compound-assignment-tdz.js
@@ -13,53 +13,53 @@ esid: pending
 
 // TDZ for lexical |let| bindings.
 {
-  assertThrowsInstanceOf(() => { let a = (a &&= 0); }, ReferenceError);
-  assertThrowsInstanceOf(() => { let a = (a ||= 0); }, ReferenceError);
-  assertThrowsInstanceOf(() => { let a = (a ??= 0); }, ReferenceError);
+  assert.throws(ReferenceError, () => { let a = (a &&= 0); });
+  assert.throws(ReferenceError, () => { let a = (a ||= 0); });
+  assert.throws(ReferenceError, () => { let a = (a ??= 0); });
 }
 
 // TDZ for lexical |const| bindings.
 {
-  assertThrowsInstanceOf(() => { const a = (a &&= 0); }, ReferenceError);
-  assertThrowsInstanceOf(() => { const a = (a ||= 0); }, ReferenceError);
-  assertThrowsInstanceOf(() => { const a = (a ??= 0); }, ReferenceError);
+  assert.throws(ReferenceError, () => { const a = (a &&= 0); });
+  assert.throws(ReferenceError, () => { const a = (a ||= 0); });
+  assert.throws(ReferenceError, () => { const a = (a ??= 0); });
 }
 
 // TDZ for parameter expressions.
 {
-  assertThrowsInstanceOf((a = (b &&= 0), b) => {}, ReferenceError);
-  assertThrowsInstanceOf((a = (b ||= 0), b) => {}, ReferenceError);
-  assertThrowsInstanceOf((a = (b ??= 0), b) => {}, ReferenceError);
+  assert.throws(ReferenceError, (a = (b &&= 0), b) => {});
+  assert.throws(ReferenceError, (a = (b ||= 0), b) => {});
+  assert.throws(ReferenceError, (a = (b ??= 0), b) => {});
 }
 
 // TDZ for |class| bindings.
 {
-  assertThrowsInstanceOf(() => { class a extends (a &&= 0) {} }, ReferenceError);
-  assertThrowsInstanceOf(() => { class a extends (a ||= 0) {} }, ReferenceError);
-  assertThrowsInstanceOf(() => { class a extends (a ??= 0) {} }, ReferenceError);
+  assert.throws(ReferenceError, () => { class a extends (a &&= 0) {} });
+  assert.throws(ReferenceError, () => { class a extends (a ||= 0) {} });
+  assert.throws(ReferenceError, () => { class a extends (a ??= 0) {} });
 }
 
 // TDZ for lexical |let| bindings with conditional assignment.
 {
-  assertThrowsInstanceOf(() => {
+  assert.throws(ReferenceError, () => {
     const False = false;
     False &&= b;
     b = 2;
     let b;
-  }, ReferenceError);
+  });
 
-  assertThrowsInstanceOf(() => {
+  assert.throws(ReferenceError, () => {
     const True = true;
     True ||= b;
     b = 2;
     let b;
-  }, ReferenceError);
+  });
 
-  assertThrowsInstanceOf(() => {
+  assert.throws(ReferenceError, () => {
     const NonNull = {};
     NonNull ??= b;
     b = 2;
     let b;
-  }, ReferenceError);
+  });
 }