diff --git a/src/ast/nodes/shared/ArrayPrototype.ts b/src/ast/nodes/shared/ArrayPrototype.ts
index 27592ecd13a..008ac82acad 100644
--- a/src/ast/nodes/shared/ArrayPrototype.ts
+++ b/src/ast/nodes/shared/ArrayPrototype.ts
@@ -133,8 +133,6 @@ export const ARRAY_PROTOTYPE = new ObjectEntity(
 		flat: METHOD_DEOPTS_SELF_RETURNS_NEW_ARRAY,
 		flatMap: METHOD_CALLS_ARG_DEOPTS_SELF_RETURNS_NEW_ARRAY,
 		forEach: METHOD_CALLS_ARG_DEOPTS_SELF_RETURNS_UNKNOWN,
-		group: METHOD_CALLS_ARG_DEOPTS_SELF_RETURNS_UNKNOWN,
-		groupToMap: METHOD_CALLS_ARG_DEOPTS_SELF_RETURNS_UNKNOWN,
 		includes: METHOD_RETURNS_BOOLEAN,
 		indexOf: METHOD_RETURNS_NUMBER,
 		join: METHOD_RETURNS_STRING,
diff --git a/test/form/samples/builtin-prototypes/array-expression/_expected.js b/test/form/samples/builtin-prototypes/array-expression/_expected.js
index a7bfe69b85e..4fea44f0ad9 100644
--- a/test/form/samples/builtin-prototypes/array-expression/_expected.js
+++ b/test/form/samples/builtin-prototypes/array-expression/_expected.js
@@ -55,14 +55,6 @@ _flatMapArray[0].effect();
 const _forEachArray = [{ effect() {} }];
 _forEachArray.forEach(element => (element.effect = () => console.log(1)));
 _forEachArray[0].effect();
-[1].group(() => console.log(1) || true);
-const _groupArray = [{ effect() {} }];
-_groupArray.group((_, element) => (element.effect = () => console.log(1)));
-_groupArray[0].effect();
-[1].groupToMap(() => console.log(1) || true);
-const _groupToMapArray = [{ effect() {} }];
-_groupToMapArray.group((_, element) => (element.effect = () => console.log(1)));
-_groupToMapArray[0].effect();
 [1].map(() => console.log(1) || 1);
 const _mapArray = [{ effect() {} }];
 _mapArray.map(element => (element.effect = () => console.log(1)));
diff --git a/test/form/samples/builtin-prototypes/array-expression/main.js b/test/form/samples/builtin-prototypes/array-expression/main.js
index e15ebe20e05..3cf1b47ca43 100644
--- a/test/form/samples/builtin-prototypes/array-expression/main.js
+++ b/test/form/samples/builtin-prototypes/array-expression/main.js
@@ -104,18 +104,6 @@ const _forEachArray = [{ effect() {} }];
 _forEachArray.forEach(element => (element.effect = () => console.log(1)));
 _forEachArray[0].effect();
 
-const _group = [1].group(() => true);
-const _groupEffect = [1].group(() => console.log(1) || true);
-const _groupArray = [{ effect() {} }];
-_groupArray.group((_, element) => (element.effect = () => console.log(1)));
-_groupArray[0].effect();
-
-const _groupToMap = [1].groupToMap(() => true);
-const _groupToMapEffect = [1].groupToMap(() => console.log(1) || true);
-const _groupToMapArray = [{ effect() {} }];
-_groupToMapArray.group((_, element) => (element.effect = () => console.log(1)));
-_groupToMapArray[0].effect();
-
 const _map = [1].map(() => 1).join(',');
 const _mapEffect = [1].map(() => console.log(1) || 1);
 const _mapArray = [{ effect() {} }];