diff --git a/.eslintrc.js b/.eslintrc.js
index db8aa1b063a8..347ca90d1ae8 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -64,7 +64,7 @@ module.exports = {
       },
     },
     {
-      files: 'types/**/*',
+      files: ['types/**/*', 'packages/jest-types/**/*'],
       rules: {
         'import/no-extraneous-dependencies': 0,
       },
diff --git a/packages/jest-phabricator/src/index.ts b/packages/jest-phabricator/src/index.ts
index 7f509ebb3545..f4e6ffbbbe9a 100644
--- a/packages/jest-phabricator/src/index.ts
+++ b/packages/jest-phabricator/src/index.ts
@@ -7,7 +7,14 @@
 
 import {TestResult} from '@jest/types';
 
-function summarize(coverageMap: TestResult.CoverageMap) {
+type AggregatedResult = TestResult.AggregatedResult;
+type CoverageMap = AggregatedResult['coverageMap'];
+
+function summarize(coverageMap: CoverageMap): CoverageMap {
+  if (!coverageMap) {
+    return coverageMap;
+  }
+
   const summaries = Object.create(null);
 
   coverageMap.files().forEach(file => {
@@ -15,9 +22,9 @@ function summarize(coverageMap: TestResult.CoverageMap) {
     const lineCoverage = coverageMap.fileCoverageFor(file).getLineCoverage();
 
     Object.keys(lineCoverage).forEach(lineNumber => {
+      const number = parseInt(lineNumber, 10);
       // Line numbers start at one
-      const number = parseInt(lineNumber, 10) - 1;
-      covered[number] = lineCoverage[lineNumber] ? 'C' : 'U';
+      covered[number - 1] = lineCoverage[number] ? 'C' : 'U';
     });
 
     for (let i = 0; i < covered.length; i++) {
@@ -32,11 +39,6 @@ function summarize(coverageMap: TestResult.CoverageMap) {
   return summaries;
 }
 
-export = function(
-  results: TestResult.AggregatedResult,
-): TestResult.AggregatedResult {
-  return {
-    ...results,
-    coverageMap: results.coverageMap && summarize(results.coverageMap),
-  };
+export = function(results: AggregatedResult): AggregatedResult {
+  return {...results, coverageMap: summarize(results.coverageMap)};
 };
diff --git a/packages/jest-types/package.json b/packages/jest-types/package.json
index 86018bd9b822..7c7cd4c7538d 100644
--- a/packages/jest-types/package.json
+++ b/packages/jest-types/package.json
@@ -11,5 +11,8 @@
   },
   "license": "MIT",
   "main": "build/index.js",
-  "types": "build/index.d.ts"
+  "types": "build/index.d.ts",
+  "dependencies": {
+    "@types/istanbul-lib-coverage": "^1.1.0"
+  }
 }
diff --git a/packages/jest-types/src/TestResult.ts b/packages/jest-types/src/TestResult.ts
index 857751e6a9f0..c9434eae5a63 100644
--- a/packages/jest-types/src/TestResult.ts
+++ b/packages/jest-types/src/TestResult.ts
@@ -5,73 +5,9 @@
  * LICENSE file in the root directory of this source tree.
  */
 
+import {CoverageMap, CoverageMapData} from 'istanbul-lib-coverage';
 import {ConsoleBuffer} from './Console';
 
-export type RawFileCoverage = {
-  path: string;
-  s: {
-    [statementId: number]: number;
-  };
-  b: {
-    [branchId: number]: number;
-  };
-  f: {
-    [functionId: number]: number;
-  };
-  l: {
-    [lineId: number]: number;
-  };
-  fnMap: {
-    [functionId: number]: any;
-  };
-  statementMap: {
-    [statementId: number]: any;
-  };
-  branchMap: {
-    [branchId: number]: any;
-  };
-  inputSourceMap?: Object;
-};
-
-export type RawCoverage = {
-  [filePath: string]: RawFileCoverage;
-};
-type FileCoverageTotal = {
-  total: number;
-  covered: number;
-  skipped: number;
-  pct: number;
-};
-
-export type CoverageSummary = {
-  lines: FileCoverageTotal;
-  statements: FileCoverageTotal;
-  branches: FileCoverageTotal;
-  functions: FileCoverageTotal;
-  merge: (other: CoverageSummary) => undefined;
-};
-
-export type FileCoverage = {
-  getLineCoverage: () => {[line: string]: string};
-  getUncoveredLines: () => Array<number>;
-  getBranchCoverageByLine: () => {[line: string]: string};
-  toJSON: () => {[line: string]: string};
-  merge: (other: Object) => undefined;
-  computeSimpleTotals: (property: string) => FileCoverageTotal;
-  computeBranchTotals: () => FileCoverageTotal;
-  resetHits: () => undefined;
-  toSummary: () => CoverageSummary;
-};
-
-export type CoverageMap = {
-  merge: (data: Object) => undefined;
-  getCoverageSummary: () => FileCoverage;
-  data: RawCoverage;
-  addFileCoverage: (fileCoverage: RawFileCoverage) => undefined;
-  files: () => Array<string>;
-  fileCoverageFor: (file: string) => FileCoverage;
-};
-
 export type SerializableError = {
   code?: unknown;
   message: string;
@@ -162,7 +98,7 @@ export type Suite = {
 
 export type TestResult = {
   console?: ConsoleBuffer | null;
-  coverage?: RawCoverage;
+  coverage?: CoverageMapData;
   displayName?: string | null;
   failureMessage?: string | null;
   leaks: boolean;
@@ -226,7 +162,7 @@ export type FormattedTestResults = {
 export type CodeCoverageReporter = any;
 
 export type CodeCoverageFormatter = (
-  coverage: RawCoverage | null | undefined,
+  coverage: CoverageMapData | null | undefined,
   reporter: CodeCoverageReporter,
 ) => Object | null | undefined;