diff --git a/test/staging/sm/lexical-environment/block-scoped-functions-deprecated-redecl.js b/test/staging/sm/lexical-environment/block-scoped-functions-deprecated-redecl.js
index 843a956ee0d..c8aa36c2632 100644
--- a/test/staging/sm/lexical-environment/block-scoped-functions-deprecated-redecl.js
+++ b/test/staging/sm/lexical-environment/block-scoped-functions-deprecated-redecl.js
@@ -84,5 +84,3 @@ try {
 }
 
 assert.sameValue(log, 'eee');
-
-if ('assert.sameValue' in this)
diff --git a/test/staging/sm/lexical-environment/block-scoped-functions-hoisted-tdz.js b/test/staging/sm/lexical-environment/block-scoped-functions-hoisted-tdz.js
index 7dc9b7af854..92cdd308bc1 100644
--- a/test/staging/sm/lexical-environment/block-scoped-functions-hoisted-tdz.js
+++ b/test/staging/sm/lexical-environment/block-scoped-functions-hoisted-tdz.js
@@ -36,5 +36,3 @@ try {
 }
 
 assert.sameValue(log, "truetrue");
-
-if ("assert.sameValue" in this)
diff --git a/test/staging/sm/lexical-environment/var-in-catch-body-annex-b-eval.js b/test/staging/sm/lexical-environment/var-in-catch-body-annex-b-eval.js
index 0bb1f81e862..9dd8bedf53c 100644
--- a/test/staging/sm/lexical-environment/var-in-catch-body-annex-b-eval.js
+++ b/test/staging/sm/lexical-environment/var-in-catch-body-annex-b-eval.js
@@ -27,5 +27,3 @@ g();
 
 assert.sameValue(x, "global-x");
 assert.sameValue(log, "42g");
-
-if ("assert.sameValue" in this)
diff --git a/test/staging/sm/regress/regress-563221.js b/test/staging/sm/regress/regress-563221.js
index 972fc47ff87..dba73b1ac2e 100644
--- a/test/staging/sm/regress/regress-563221.js
+++ b/test/staging/sm/regress/regress-563221.js
@@ -12,5 +12,3 @@ description: |
 esid: pending
 ---*/
 "" + eval("(function () { if (x) ; else if (y) n(); else { " + Array(10000).join("e;") + " } });");
-
-if (this.assert.sameValue)