Class constructor TranslateLoader cannot be invoked without 'new' --- error is showing while running jest test in angular 12 - angular12

Question

Class constructor TranslateLoader cannot be invoked without 'new' --- error is showing while running jest test in angular 12, please someone help me.
"devDependencies": {
"#angular-devkit/build-angular": "~12.0.0",
"#angular/cli": "~12.0.0",
"#angular/compiler-cli": "~12.0.0",
"#fullhuman/postcss-purgecss": "^5.0.0",
"#types/jest": "^29.2.0",
"#types/node": "^12.11.1",
"cssnano": "^5.1.13",
"jest": "^29.2.1",
"jest-preset-angular": "^12.2.2",
"jscat": "0.0.2",
"ngx-translate-testing": "^5.2.0",
"postcss": "^8.4.17",
"postcss-loader": "^7.0.1",
"postcss-preset-env": "^7.8.2",
"postcss-scss": "^4.0.5",
"sass": "^1.55.0",
"typescript": "~4.2.3"
}
Error log:
TypeError: Class constructor TranslateLoader cannot be invoked without 'new'
at new TestTranslateLoader (projects/testing/src/lib/test-translate-loader.service.ts:23:5)
at TranslateTestingModule.get (projects/testing/src/lib/testing.module.ts:95:7)
at R3Injector.Object.<anonymous>.R3Injector.processInjectorType (../packages/core/src/di/r3_injector.ts:366:61)
at ../packages/core/src/di/r3_injector.ts:326:20
at ../packages/core/src/util/array_utils.ts:71:74
at Array.forEach (<anonymous>)
at deepForEach (../packages/core/src/util/array_utils.ts:71:9)
at ../packages/core/src/util/array_utils.ts:71:49
at Array.forEach (<anonymous>)
at deepForEach (../packages/core/src/util/array_utils.ts:71:9)
at ../packages/core/src/util/array_utils.ts:71:49
at Array.forEach (<anonymous>)
at deepForEach (../packages/core/src/util/array_utils.ts:71:9)
at R3Injector.Object.<anonymous>.R3Injector.processInjectorType (../packages/core/src/di/r3_injector.ts:325:9)
at ../packages/core/src/di/r3_injector.ts:147:44
at ../packages/core/src/util/array_utils.ts:71:74
at Array.forEach (<anonymous>)
at deepForEach (../packages/core/src/util/array_utils.ts:71:9)
at new R3Injector (../packages/core/src/di/r3_injector.ts:147:5)
at createInjectorWithoutInjectorInstances (../packages/core/src/di/r3_injector.ts:97:10)
at new NgModuleRef$1 (../packages/core/src/render3/ng_module_ref.ts:54:24)
at R3TestBedCompiler.Object.<anonymous>.R3TestBedCompiler.finalize (../packages/core/testing/src/r3_test_bed_compiler.ts:260:26)
at TestBedRender3.get (../packages/core/testing/src/r3_test_bed.ts:370:43)
at TestBedRender3.Object.<anonymous>.TestBedRender3.inject (../packages/core/testing/src/r3_test_bed.ts:268:25)
at TestBedRender3.Object.<anonymous>.TestBedRender3.createComponent (../packages/core/testing/src/r3_test_bed.ts:325:40)
at Function.Object.<anonymous>.TestBedRender3.createComponent (../packages/core/testing/src/r3_test_bed.ts:177:33)
at src/app/shared/components/translate/translate.component.spec.ts:23:23
at _ZoneDelegate.Object.<anonymous>._ZoneDelegate.invoke (node_modules/zone.js/bundles/zone-testing-bundle.umd.js:409:30)
at ProxyZoneSpec.Object.<anonymous>.ProxyZoneSpec.onInvoke (node_modules/zone.js/bundles/zone-testing-bundle.umd.js:3830:43)
at _ZoneDelegate.Object.<anonymous>._ZoneDelegate.invoke (node_modules/zone.js/bundles/zone-testing-bundle.umd.js:408:56)
at Zone.Object.<anonymous>.Zone.run (node_modules/zone.js/bundles/zone-testing-bundle.umd.js:169:47)
at Object.wrappedFunc (node_modules/zone.js/bundles/zone-testing-bundle.umd.js:4330:34)