diff --git a/src/options.json b/src/options.json
index 0895597f..ce594891 100644
--- a/src/options.json
+++ b/src/options.json
@@ -122,10 +122,6 @@
         }
       ]
     },
-    "icss": {
-      "description": "Enables/Disables handling the CSS module interoperable import/export format ((https://github.com/webpack-contrib/css-loader#icss)",
-      "type": "boolean"
-    },
     "sourceMap": {
       "description": "Enables/Disables generation of source maps (https://github.com/webpack-contrib/css-loader#sourcemap).",
       "type": "boolean"
diff --git a/src/utils.js b/src/utils.js
index 9b506818..67e50566 100644
--- a/src/utils.js
+++ b/src/utils.js
@@ -219,8 +219,6 @@ function normalizeOptions(rawOptions, loaderContext) {
     url: typeof rawOptions.url === 'undefined' ? true : rawOptions.url,
     import: typeof rawOptions.import === 'undefined' ? true : rawOptions.import,
     modules: modulesOptions,
-    // TODO remove in the next major release
-    icss: typeof rawOptions.icss === 'undefined' ? false : rawOptions.icss,
     sourceMap:
       typeof rawOptions.sourceMap === 'boolean'
         ? rawOptions.sourceMap
diff --git a/test/__snapshots__/modules-option.test.js.snap b/test/__snapshots__/modules-option.test.js.snap
index 087eba1e..7e4dfd8b 100644
--- a/test/__snapshots__/modules-option.test.js.snap
+++ b/test/__snapshots__/modules-option.test.js.snap
@@ -12529,52 +12529,6 @@ Array [
 
 exports[`"modules" option should work with the \`exportGlobals\` option (the \`mode\` option is \`pure\`): warnings 1`] = `Array []`;
 
-exports[`"modules" option show work and warn about the "icss" option deprecation: errors 1`] = `Array []`;
-
-exports[`"modules" option show work and warn about the "icss" option deprecation: module 1`] = `
-"// Imports
-import ___CSS_LOADER_API_IMPORT___ from \\"../../../../../../src/runtime/api.js\\";
-import ___CSS_LOADER_ICSS_IMPORT_0___ from \\"-!../../../../../../src/index.js??[ident]!./vars.css\\";
-var ___CSS_LOADER_EXPORT___ = ___CSS_LOADER_API_IMPORT___(false);
-___CSS_LOADER_EXPORT___.i(___CSS_LOADER_ICSS_IMPORT_0___, \\"\\", true);
-// Module
-___CSS_LOADER_EXPORT___.push([module.id, \\".className {\\\\n  color: \\" + ___CSS_LOADER_ICSS_IMPORT_0___.locals[\\"primary-color\\"] + \\";\\\\n}\\\\n\\", \\"\\"]);
-// Exports
-___CSS_LOADER_EXPORT___.locals = {
-	\\"primary-color\\": \\"\\" + ___CSS_LOADER_ICSS_IMPORT_0___.locals[\\"primary-color\\"] + \\"\\"
-};
-export default ___CSS_LOADER_EXPORT___;
-"
-`;
-
-exports[`"modules" option show work and warn about the "icss" option deprecation: result 1`] = `
-Array [
-  Array [
-    "../../src/index.js?[ident]!./modules/icss/tests-cases/import/vars.css",
-    "
-",
-    "",
-  ],
-  Array [
-    "./modules/icss/tests-cases/import/source.css",
-    ".className {
-  color: red;
-}
-",
-    "",
-  ],
-]
-`;
-
-exports[`"modules" option show work and warn about the "icss" option deprecation: warnings 1`] = `
-Array [
-  "ModuleWarning: Module Warning (from \`replaced original path\`):
-The \\"icss\\" option is deprecated, use \\"modules.compileType: \\"icss\\"\\" instead",
-  "ModuleWarning: Module Warning (from \`replaced original path\`):
-The \\"icss\\" option is deprecated, use \\"modules.compileType: \\"icss\\"\\" instead",
-]
-`;
-
 exports[`"modules" option show work with the "compileType" and "exportOnlyLocals" options: errors 1`] = `Array []`;
 
 exports[`"modules" option show work with the "compileType" and "exportOnlyLocals" options: module 1`] = `
diff --git a/test/__snapshots__/validate-options.test.js.snap b/test/__snapshots__/validate-options.test.js.snap
index f3f6ecc4..f8a113dd 100644
--- a/test/__snapshots__/validate-options.test.js.snap
+++ b/test/__snapshots__/validate-options.test.js.snap
@@ -6,18 +6,6 @@ exports[`validate options should throw an error on the "esModule" option with "t
    -> Use the ES modules syntax (https://github.com/webpack-contrib/css-loader#esmodule)."
 `;
 
-exports[`validate options should throw an error on the "icss" option with "1" value 1`] = `
-"Invalid options object. CSS Loader has been initialized using an options object that does not match the API schema.
- - options.icss should be a boolean.
-   -> Enables/Disables handling the CSS module interoperable import/export format ((https://github.com/webpack-contrib/css-loader#icss)"
-`;
-
-exports[`validate options should throw an error on the "icss" option with "true" value 1`] = `
-"Invalid options object. CSS Loader has been initialized using an options object that does not match the API schema.
- - options.icss should be a boolean.
-   -> Enables/Disables handling the CSS module interoperable import/export format ((https://github.com/webpack-contrib/css-loader#icss)"
-`;
-
 exports[`validate options should throw an error on the "import" option with "true" value 1`] = `
 "Invalid options object. CSS Loader has been initialized using an options object that does not match the API schema.
  - options.import should be one of these:
@@ -245,49 +233,49 @@ exports[`validate options should throw an error on the "sourceMap" option with "
 exports[`validate options should throw an error on the "unknown" option with "/test/" value 1`] = `
 "Invalid options object. CSS Loader has been initialized using an options object that does not match the API schema.
  - options has an unknown property 'unknown'. These properties are valid:
-   object { url?, import?, modules?, icss?, sourceMap?, importLoaders?, esModule? }"
+   object { url?, import?, modules?, sourceMap?, importLoaders?, esModule? }"
 `;
 
 exports[`validate options should throw an error on the "unknown" option with "[]" value 1`] = `
 "Invalid options object. CSS Loader has been initialized using an options object that does not match the API schema.
  - options has an unknown property 'unknown'. These properties are valid:
-   object { url?, import?, modules?, icss?, sourceMap?, importLoaders?, esModule? }"
+   object { url?, import?, modules?, sourceMap?, importLoaders?, esModule? }"
 `;
 
 exports[`validate options should throw an error on the "unknown" option with "{"foo":"bar"}" value 1`] = `
 "Invalid options object. CSS Loader has been initialized using an options object that does not match the API schema.
  - options has an unknown property 'unknown'. These properties are valid:
-   object { url?, import?, modules?, icss?, sourceMap?, importLoaders?, esModule? }"
+   object { url?, import?, modules?, sourceMap?, importLoaders?, esModule? }"
 `;
 
 exports[`validate options should throw an error on the "unknown" option with "{}" value 1`] = `
 "Invalid options object. CSS Loader has been initialized using an options object that does not match the API schema.
  - options has an unknown property 'unknown'. These properties are valid:
-   object { url?, import?, modules?, icss?, sourceMap?, importLoaders?, esModule? }"
+   object { url?, import?, modules?, sourceMap?, importLoaders?, esModule? }"
 `;
 
 exports[`validate options should throw an error on the "unknown" option with "1" value 1`] = `
 "Invalid options object. CSS Loader has been initialized using an options object that does not match the API schema.
  - options has an unknown property 'unknown'. These properties are valid:
-   object { url?, import?, modules?, icss?, sourceMap?, importLoaders?, esModule? }"
+   object { url?, import?, modules?, sourceMap?, importLoaders?, esModule? }"
 `;
 
 exports[`validate options should throw an error on the "unknown" option with "false" value 1`] = `
 "Invalid options object. CSS Loader has been initialized using an options object that does not match the API schema.
  - options has an unknown property 'unknown'. These properties are valid:
-   object { url?, import?, modules?, icss?, sourceMap?, importLoaders?, esModule? }"
+   object { url?, import?, modules?, sourceMap?, importLoaders?, esModule? }"
 `;
 
 exports[`validate options should throw an error on the "unknown" option with "test" value 1`] = `
 "Invalid options object. CSS Loader has been initialized using an options object that does not match the API schema.
  - options has an unknown property 'unknown'. These properties are valid:
-   object { url?, import?, modules?, icss?, sourceMap?, importLoaders?, esModule? }"
+   object { url?, import?, modules?, sourceMap?, importLoaders?, esModule? }"
 `;
 
 exports[`validate options should throw an error on the "unknown" option with "true" value 1`] = `
 "Invalid options object. CSS Loader has been initialized using an options object that does not match the API schema.
  - options has an unknown property 'unknown'. These properties are valid:
-   object { url?, import?, modules?, icss?, sourceMap?, importLoaders?, esModule? }"
+   object { url?, import?, modules?, sourceMap?, importLoaders?, esModule? }"
 `;
 
 exports[`validate options should throw an error on the "url" option with "true" value 1`] = `
diff --git a/test/modules-option.test.js b/test/modules-option.test.js
index 3fe8f558..44276e1b 100644
--- a/test/modules-option.test.js
+++ b/test/modules-option.test.js
@@ -1239,25 +1239,6 @@ describe('"modules" option', () => {
     });
   });
 
-  it('show work and warn about the "icss" option deprecation', async () => {
-    const compiler = getCompiler(
-      './modules/icss/tests-cases/import/source.js',
-      {
-        icss: true,
-      }
-    );
-    const stats = await compile(compiler);
-
-    expect(
-      getModuleSource('./modules/icss/tests-cases/import/source.css', stats)
-    ).toMatchSnapshot('module');
-    expect(getExecutedCode('main.bundle.js', compiler, stats)).toMatchSnapshot(
-      'result'
-    );
-    expect(getWarnings(stats)).toMatchSnapshot('warnings');
-    expect(getErrors(stats)).toMatchSnapshot('errors');
-  });
-
   it('show work with the "compileType" and "exportOnlyLocals" options', async () => {
     const compiler = getCompiler(
       './modules/icss/tests-cases/import/source.js',
diff --git a/test/validate-options.test.js b/test/validate-options.test.js
index 95c50fc7..748c8c56 100644
--- a/test/validate-options.test.js
+++ b/test/validate-options.test.js
@@ -10,10 +10,6 @@ describe('validate options', () => {
       success: [true, false, () => {}],
       failure: ['true'],
     },
-    icss: {
-      success: [true, false],
-      failure: ['true', 1],
-    },
     modules: {
       success: [
         true,