diff --git a/src/compiler/moduleNameResolver.ts b/src/compiler/moduleNameResolver.ts
index e40029ff6fe..be1a09548fa 100644
--- a/src/compiler/moduleNameResolver.ts
+++ b/src/compiler/moduleNameResolver.ts
@@ -86,7 +86,14 @@ namespace ts {
         return { fileName: resolved.path, packageId: resolved.packageId };
     }
 
-    function createResolvedModuleWithFailedLookupLocations(resolved: Resolved | undefined, isExternalLibraryImport: boolean | undefined, failedLookupLocations: string[], affectingLocations: string[], diagnostics: Diagnostic[], resultFromCache: ResolvedModuleWithFailedLookupLocations | undefined): ResolvedModuleWithFailedLookupLocations {
+    function createResolvedModuleWithFailedLookupLocations(
+        resolved: Resolved | undefined,
+        isExternalLibraryImport: boolean | undefined,
+        failedLookupLocations: string[],
+        affectingLocations: string[],
+        diagnostics: Diagnostic[],
+        resultFromCache: ResolvedModuleWithFailedLookupLocations | undefined
+    ): ResolvedModuleWithFailedLookupLocations {
         if (resultFromCache) {
             resultFromCache.failedLookupLocations.push(...failedLookupLocations);
             resultFromCache.affectingLocations.push(...affectingLocations);
@@ -2578,8 +2585,7 @@ namespace ts {
             host,
             traceEnabled,
             failedLookupLocations,
-            affectingLocations,
-            packageJsonInfoCache: cache,
+            affectingLocations, packageJsonInfoCache: cache,
             features: NodeResolutionFeatures.None,
             conditions: [],
             requestContainingDirectory: containingDirectory,
@@ -2652,7 +2658,7 @@ namespace ts {
             features: NodeResolutionFeatures.None,
             conditions: [],
             requestContainingDirectory: undefined,
-            reportDiagnostic: diag => void diagnostics.push(diag)
+            reportDiagnostic: diag => void diagnostics.push(diag),
         };
         const resolved = loadModuleFromImmediateNodeModulesDirectory(Extensions.DtsOnly, moduleName, globalCache, state, /*typesScopeOnly*/ false, /*cache*/ undefined, /*redirectedReference*/ undefined);
         return createResolvedModuleWithFailedLookupLocations(
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index 08362cdfce2..df2179cba77 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -6768,7 +6768,7 @@ namespace ts {
         readonly resolvedTypeReferenceDirective: ResolvedTypeReferenceDirective | undefined;
         readonly failedLookupLocations: string[];
         /*@internal*/ readonly affectingLocations: string[];
-        /* @internal */ readonly resolutionDiagnostics: Diagnostic[]
+        /* @internal */ resolutionDiagnostics: Diagnostic[];
     }
 
     /* @internal */
diff --git a/src/testRunner/unittests/moduleResolution.ts b/src/testRunner/unittests/moduleResolution.ts
index 5aab2367b6c..1f85f97827c 100644
--- a/src/testRunner/unittests/moduleResolution.ts
+++ b/src/testRunner/unittests/moduleResolution.ts
@@ -141,7 +141,7 @@ namespace ts {
                 checkResolvedModule(resolution.resolvedModule, createResolvedModule(moduleFile.name));
                 // expect three failed lookup location - attempt to load module as file with all supported extensions
                 assert.equal(resolution.failedLookupLocations.length, supportedTSExtensions[0].length);
-                // TODO
+                assert.deepEqual(resolution.affectingLocations, [packageJsonFileName]);
             }
         }