diff --git a/package.json b/package.json
index a5f14b834..67327139b 100644
--- a/package.json
+++ b/package.json
@@ -53,7 +53,7 @@
     "@prettier/parse-srcset": "3.1.0",
     "@typescript-eslint/typescript-estree": "8.55.0",
     "@typescript-eslint/visitor-keys": "8.55.0",
-    "acorn": "8.15.0",
+    "acorn": "8.16.0",
     "acorn-jsx": "5.3.2",
     "angular-estree-parser": "15.3.0",
     "angular-html-parser": "10.4.0",
diff --git a/tests/format/js/explicit-resource-management/__snapshots__/format.test.js.snap b/tests/format/js/explicit-resource-management/__snapshots__/format.test.js.snap
index 08f5aa8d1..53d3ce6b8 100644
--- a/tests/format/js/explicit-resource-management/__snapshots__/format.test.js.snap
+++ b/tests/format/js/explicit-resource-management/__snapshots__/format.test.js.snap
@@ -237,28 +237,6 @@ async function f() {
 ================================================================================
 `;
 
-exports[`valid-await-expr-using.js format[acorn] 1`] = `
-"Unexpected token (2:14)
-  1 | async function f() {
-> 2 |   await using[x];
-    |              ^
-  3 |   await using.x + await using(x) ? await using?.x : await using\`x\`;
-  4 | }
-  5 |
-Cause: Unexpected token (2:13)"
-`;
-
-exports[`valid-await-expr-using.js format[espree] 1`] = `
-"Unexpected token [ (2:14)
-  1 | async function f() {
-> 2 |   await using[x];
-    |              ^
-  3 |   await using.x + await using(x) ? await using?.x : await using\`x\`;
-  4 | }
-  5 |
-Cause: Unexpected token ["
-`;
-
 exports[`valid-await-expr-using-in.js format 1`] = `
 ====================================options=====================================
 parsers: ["babel", "flow", "typescript"]
@@ -276,26 +254,6 @@ async function f() {
 ================================================================================
 `;
 
-exports[`valid-await-expr-using-in.js format[acorn] 1`] = `
-"Unexpected keyword 'in' (2:15)
-  1 | async function f() {
-> 2 |   await using in foo;
-    |               ^
-  3 | }
-  4 |
-Cause: Unexpected keyword 'in' (2:14)"
-`;
-
-exports[`valid-await-expr-using-in.js format[espree] 1`] = `
-"Unexpected keyword 'in' (2:15)
-  1 | async function f() {
-> 2 |   await using in foo;
-    |               ^
-  3 | }
-  4 |
-Cause: Unexpected keyword 'in'"
-`;
-
 exports[`valid-await-expr-using-instanceof.js format 1`] = `
 ====================================options=====================================
 parsers: ["babel", "flow", "typescript"]
@@ -313,26 +271,6 @@ async function f() {
 ================================================================================
 `;
 
-exports[`valid-await-expr-using-instanceof.js format[acorn] 1`] = `
-"Unexpected keyword 'instanceof' (2:15)
-  1 | async function f() {
-> 2 |   await using instanceof foo;
-    |               ^
-  3 | }
-  4 |
-Cause: Unexpected keyword 'instanceof' (2:14)"
-`;
-
-exports[`valid-await-expr-using-instanceof.js format[espree] 1`] = `
-"Unexpected keyword 'instanceof' (2:15)
-  1 | async function f() {
-> 2 |   await using instanceof foo;
-    |               ^
-  3 | }
-  4 |
-Cause: Unexpected keyword 'instanceof'"
-`;
-
 exports[`valid-await-using-asi-assignment.js format 1`] = `
 ====================================options=====================================
 parsers: ["babel", "flow", "typescript"]
@@ -676,6 +614,28 @@ async function f() {
 ================================================================================
 `;
 
+exports[`valid-for-using-binding-of-of.js format[acorn] 1`] = `
+"Assigning to rvalue (2:8)
+  1 | async function f() {
+> 2 |   for (await using of of of);
+    |        ^
+  3 |   for await (await using of of of);
+  4 | }
+  5 |
+Cause: Assigning to rvalue (2:7)"
+`;
+
+exports[`valid-for-using-binding-of-of.js format[espree] 1`] = `
+"Assigning to rvalue (2:8)
+  1 | async function f() {
+> 2 |   for (await using of of of);
+    |        ^
+  3 |   for await (await using of of of);
+  4 | }
+  5 |
+Cause: Assigning to rvalue"
+`;
+
 exports[`valid-for-using-binding-of-of.js format[flow] 1`] = `
 "Invalid left-hand side in for-of (2:8)
   1 | async function f() {
@@ -1029,26 +989,6 @@ for (using\`\`.foo in []);
 ================================================================================
 `;
 
-exports[`valid-using-as-identifier-for-in.js format[acorn] 1`] = `
-"Unexpected keyword 'in' (1:12)
-> 1 | for (using in []);
-    |            ^
-  2 | for (using.foo in []);
-  3 | for (using().foo in []);
-  4 | for (using\`\`.foo in []);
-Cause: Unexpected keyword 'in' (1:11)"
-`;
-
-exports[`valid-using-as-identifier-for-in.js format[espree] 1`] = `
-"Unexpected keyword 'in' (1:12)
-> 1 | for (using in []);
-    |            ^
-  2 | for (using.foo in []);
-  3 | for (using().foo in []);
-  4 | for (using\`\`.foo in []);
-Cause: Unexpected keyword 'in'"
-`;
-
 exports[`valid-using-as-identifier-for-init.js format 1`] = `
 ====================================options=====================================
 parsers: ["babel", "flow", "typescript"]
@@ -1096,22 +1036,6 @@ using in using instanceof using;
 ================================================================================
 `;
 
-exports[`valid-using-as-identifier-in.js format[acorn] 1`] = `
-"Unexpected keyword 'in' (1:7)
-> 1 | using in using instanceof using;
-    |       ^
-  2 |
-Cause: Unexpected keyword 'in' (1:6)"
-`;
-
-exports[`valid-using-as-identifier-in.js format[espree] 1`] = `
-"Unexpected keyword 'in' (1:7)
-> 1 | using in using instanceof using;
-    |       ^
-  2 |
-Cause: Unexpected keyword 'in'"
-`;
-
 exports[`valid-using-binding-basic.js format 1`] = `
 ====================================options=====================================
 parsers: ["babel", "flow", "typescript"]
@@ -1215,22 +1139,6 @@ parsers: ["babel", "flow", "typescript"]
 ================================================================================
 `;
 
-exports[`valid-using-binding-non-bmp.js format[acorn] 1`] = `
-"Unexpected token (1:9)
-> 1 | { using 𠮷 = foo(); }
-    |         ^
-  2 |
-Cause: Unexpected token (1:8)"
-`;
-
-exports[`valid-using-binding-non-bmp.js format[espree] 1`] = `
-"Unexpected token 𠮷 (1:9)
-> 1 | { using 𠮷 = foo(); }
-    |         ^
-  2 |
-Cause: Unexpected token 𠮷"
-`;
-
 exports[`valid-using-binding-non-bmp.js format[flow] 1`] = `
 "Unexpected identifier, expected the end of an expression statement (\`;\`) (1:9)
 > 1 | { using 𠮷 = foo(); }
diff --git a/tests/format/js/explicit-resource-management/format.test.js b/tests/format/js/explicit-resource-management/format.test.js
index ac05610ad..f3a3ac3db 100644
--- a/tests/format/js/explicit-resource-management/format.test.js
+++ b/tests/format/js/explicit-resource-management/format.test.js
@@ -56,26 +56,16 @@ runFormatTest(import.meta, ["babel", "flow", "typescript"], {
     acorn: [
       "invalid-duplicate-using-bindings.js",
       // "invalid-script-top-level-using-binding.js",
-      "valid-await-expr-using-in.js",
-      "valid-await-expr-using-instanceof.js",
-      "valid-await-expr-using.js",
       "valid-module-block-top-level-using-binding.js",
       "valid-module-block-top-level-await-using-binding.js",
-      "valid-using-as-identifier-for-in.js",
-      "valid-using-as-identifier-in.js",
-      "valid-using-binding-non-bmp.js",
+      "valid-for-using-binding-of-of.js",
     ],
     espree: [
       "invalid-duplicate-using-bindings.js",
       // "invalid-script-top-level-using-binding.js",
-      "valid-await-expr-using-in.js",
-      "valid-await-expr-using-instanceof.js",
-      "valid-await-expr-using.js",
       "valid-module-block-top-level-using-binding.js",
       "valid-module-block-top-level-await-using-binding.js",
-      "valid-using-as-identifier-for-in.js",
-      "valid-using-as-identifier-in.js",
-      "valid-using-binding-non-bmp.js",
+      "valid-for-using-binding-of-of.js",
     ],
     meriyah: [
       "for-await-using-of-comments.js",
diff --git a/yarn.lock b/yarn.lock
index 12d482b76..d6aa820f8 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2877,12 +2877,12 @@ __metadata:
   languageName: node
   linkType: hard
 
-"acorn@npm:8.15.0, acorn@npm:^8.15.0":
-  version: 8.15.0
-  resolution: "acorn@npm:8.15.0"
+"acorn@npm:8.16.0, acorn@npm:^8.15.0":
+  version: 8.16.0
+  resolution: "acorn@npm:8.16.0"
   bin:
     acorn: bin/acorn
-  checksum: 10/77f2de5051a631cf1729c090e5759148459cdb76b5f5c70f890503d629cf5052357b0ce783c0f976dd8a93c5150f59f6d18df1def3f502396a20f81282482fa4
+  checksum: 10/690c673bb4d61b38ef82795fab58526471ad7f7e67c0e40c4ff1e10ecd80ce5312554ef633c9995bfc4e6d170cef165711f9ca9e49040b62c0c66fbf2dd3df2b
   languageName: node
   linkType: hard
 
@@ -8401,7 +8401,7 @@ __metadata:
     "@typescript-eslint/parser": "npm:8.55.0"
     "@typescript-eslint/typescript-estree": "npm:8.55.0"
     "@typescript-eslint/visitor-keys": "npm:8.55.0"
-    acorn: "npm:8.15.0"
+    acorn: "npm:8.16.0"
     acorn-jsx: "npm:5.3.2"
     angular-estree-parser: "npm:15.3.0"
     angular-html-parser: "npm:10.4.0"