Cannot compare enums in jasmine after angular migration from 6 to 7

I am in the process of migrating an Angular application from v6 to v7. All is well except any test that compares enums. When I run my tests, I get many errors regarding my enums like so

ERROR in src/.../some-thing.component.spec.ts: error TS2345: Argument of type 'PlanDuration.SixMonths' is not assignable to parameter of type 'Expected<PlanDuration.TwelveMonths>'.

An example of test being run looks like this:

export enum PlanDuration {
  SixMonths,
  TwelveMonths
}

...
    it('should toggle plan duration to six months if the event source id is the toggle duration and the event is not checked', () => {

      component.selectedPlanDuration = PlanDuration.TwelveMonths;
      component.handleToggle(event);
      expect(component.selectedPlanDuration).toBe(PlanDuration.SixMonths); // Tests cannot run because of errors here
    });

However, if I cast my enum to number, my tests work perfectly! This would be less than ideal to update my specs everywhere like this:

expect(component.selectedPlanDuration).toBe(<number> PlanDuration.SixMonths);

I'm unsure if I missed something in my package.json. I've compared a fresh angular 7 project to my own projects and the versions of angular core, typescript, jasmine and karma between them are the same.

How can I get my tests to compare enums properly? Below is my package.json

"dependencies": {
    "@angular/animations": "~7.2.0",
    "@angular/common": "~7.2.0",
    "@angular/compiler": "~7.2.0",
    "@angular/core": "~7.2.0",
    "@angular/forms": "~7.2.0",
    "@angular/http": "~7.2.0",
    "@angular/platform-browser": "~7.2.0",
    "@angular/platform-browser-dynamic": "~7.2.0",
    "@angular/router": "~7.2.0",
    "core-js": "^2.5.4",
    "rxjs": "~6.4.0",
    "tslib": "^1.9.0",
    "zone.js": "~0.8.26",
    "@angular/cdk": "^7.0.3",
    "@angular/flex-layout": "7.0.0-beta.24",
    "@angular/material": "7.3.6",
    "hammerjs": "2.0.8",
    "intl": "1.2.5",
    "jshashes": "1.0.7",
    "lodash-es": "4.17.11",
    "request-promise-native": "1.0.5",
    "stream": "0.0.2",
    "timers": "0.1.1",
    "url-search-params-polyfill": "5.0.0",
    "xml2js": "0.4.19"
  },
  "devDependencies": {
    "@angular-devkit/build-angular": "~0.13.0",
    "@angular/cli": "~7.3.7",
    "@angular/compiler-cli": "~7.2.0",
    "@angular/language-service": "~7.2.0",
    "@types/node": "~8.9.4",
    "@types/jasmine": "~2.8.8",
    "@types/jasminewd2": "~2.0.3",
    "codelyzer": "~4.5.0",
    "jasmine-core": "~2.99.1",
    "jasmine-spec-reporter": "~4.2.1",
    "karma": "~4.0.0",
    "karma-chrome-launcher": "~2.2.0",
    "karma-coverage-istanbul-reporter": "~2.0.1",
    "karma-jasmine": "~1.1.2",
    "karma-jasmine-html-reporter": "^0.2.2",
    "protractor": "~5.4.0",
    "ts-node": "~7.0.0",
    "tslint": "~5.11.0",
    "typescript": "~3.2.2",
    "@types/lodash-es": "4.17.1",
    "gulp": "3.9.1",
    "gulp-stylelint": "7.0.0",
    "jasmine-data-provider": "2.2.0",
    "karma-cli": "1.0.1",
    "karma-junit-reporter": "1.2.0",
    "karma-parallel": "0.3.0",
    "karma-spec-reporter": "0.0.32",
    "lodash": "4.17.11",
    "moment": "2.22.2",
    "npm": "6.0.0",
    "protractor-beautiful-reporter": "1.2.5",
    "protractor-jasmine2-screenshot-reporter": "0.5.0",
    "stylelint": "9.6.0",
    "stylelint-order": "1.0.0",
    "tslint-jasmine-noSkipOrFocus": "1.0.9"
  }

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