diff --git a/crates/swc/tests/deno-unit/README.md b/crates/swc/tests/deno-unit/README.md
index b5040ea670a..cde0ce3af99 100644
--- a/crates/swc/tests/deno-unit/README.md
+++ b/crates/swc/tests/deno-unit/README.md
@@ -26,7 +26,7 @@ unitTest({
 );
 ```
 
-`unitTest` is is a wrapper function that enhances `Deno.test()` API in several
+`unitTest` is a wrapper function that enhances `Deno.test()` API in several
 ways:
 
 -   ability to conditionally skip tests using `UnitTestOptions.skip`
diff --git a/crates/swc_ecma_transforms_base/src/rename/mod.rs b/crates/swc_ecma_transforms_base/src/rename/mod.rs
index 2f00233b56d..d9b484f131b 100644
--- a/crates/swc_ecma_transforms_base/src/rename/mod.rs
+++ b/crates/swc_ecma_transforms_base/src/rename/mod.rs
@@ -270,7 +270,7 @@ where
         // 3. Per-unit renaming
         // 4. Top level renaming
         //
-        // This is because the the top level map may contain a mapping which conflicts
+        // This is because the top level map may contain a mapping which conflicts
         // with a map from one of the children.
         //
         // See https://github.com/swc-project/swc/pull/7615
diff --git a/crates/swc_ecma_transforms_optimization/src/simplify/branch/tests.rs b/crates/swc_ecma_transforms_optimization/src/simplify/branch/tests.rs
index a953ca9e91f..2781d8ff734 100644
--- a/crates/swc_ecma_transforms_optimization/src/simplify/branch/tests.rs
+++ b/crates/swc_ecma_transforms_optimization/src/simplify/branch/tests.rs
@@ -385,7 +385,7 @@ fn test_remove_useless_ops2() {
     test("Math.random(f() + g())", "f(),g();");
     test("Math.random(f(),g(),h())", "f(),g(),h();");
 
-    // Calls to functions with unknown side-effects are are left.
+    // Calls to functions with unknown side-effects are left.
     test_same("f();");
     test_same("(function () { f(); })();");
 
diff --git a/crates/swc_estree_compat/src/babelify/decl.rs b/crates/swc_estree_compat/src/babelify/decl.rs
index 0fdb37e3ed6..656f9b0e77c 100644
--- a/crates/swc_estree_compat/src/babelify/decl.rs
+++ b/crates/swc_estree_compat/src/babelify/decl.rs
@@ -50,7 +50,7 @@ impl Babelify for ClassDecl {
         let is_abstract = self.class.is_abstract;
         // NOTE: The body field needs a bit of special handling because babel
         // represents the body as a node, whereas swc represents it as a vector of
-        // statements. This means that swc does not have a span corresponding the the
+        // statements. This means that swc does not have a span corresponding the
         // class body base node for babel. To solve this, we generate a new span
         // starting from the end of the identifier to the end of the body.
         // For example,