diff --git a/src/error/__tests__/GraphQLError-test.js b/src/error/__tests__/GraphQLError-test.js
index 4ccd166fee..c9acb6cdf3 100644
--- a/src/error/__tests__/GraphQLError-test.js
+++ b/src/error/__tests__/GraphQLError-test.js
@@ -10,7 +10,7 @@
 import { expect } from 'chai';
 import { describe, it } from 'mocha';
 
-import { parse, Source, GraphQLError } from '../../';
+import { parse, Source, GraphQLError, formatError } from '../../';
 
 
 describe('GraphQLError', () => {
@@ -123,4 +123,20 @@ describe('GraphQLError', () => {
     );
   });
 
+  it('default error formatter includes path', () => {
+    const e = new GraphQLError(
+      'msg',
+      null,
+      null,
+      null,
+      [ 'path', 3, 'to', 'field' ]
+    );
+
+    expect(formatError(e)).to.deep.equal({
+      message: 'msg',
+      locations: undefined,
+      path: [ 'path', 3, 'to', 'field' ]
+    });
+  });
+
 });
diff --git a/src/error/formatError.js b/src/error/formatError.js
index 320afcf60f..e776075bd6 100644
--- a/src/error/formatError.js
+++ b/src/error/formatError.js
@@ -20,13 +20,15 @@ export function formatError(error: GraphQLError): GraphQLFormattedError {
   invariant(error, 'Received null or undefined error.');
   return {
     message: error.message,
-    locations: error.locations
+    locations: error.locations,
+    path: error.path
   };
 }
 
 export type GraphQLFormattedError = {
   message: string,
-  locations: ?Array<GraphQLErrorLocation>
+  locations: ?Array<GraphQLErrorLocation>,
+  path: ?Array<string | number>
 };
 
 export type GraphQLErrorLocation = {
diff --git a/src/execution/__tests__/executor-test.js b/src/execution/__tests__/executor-test.js
index 797a4f3e8b..176360b83b 100644
--- a/src/execution/__tests__/executor-test.js
+++ b/src/execution/__tests__/executor-test.js
@@ -403,27 +403,38 @@ describe('Execute: Handles basic execution tasks', () => {
 
     expect(result.errors && result.errors.map(formatError)).to.deep.equal([
       { message: 'Error getting syncError',
-        locations: [ { line: 3, column: 7 } ] },
+        locations: [ { line: 3, column: 7 } ],
+        path: [ 'syncError' ] },
       { message: 'Error getting syncRawError',
-        locations: [ { line: 4, column: 7 } ] },
+        locations: [ { line: 4, column: 7 } ],
+        path: [ 'syncRawError' ] },
       { message: 'Error getting syncReturnError',
-        locations: [ { line: 5, column: 7 } ] },
+        locations: [ { line: 5, column: 7 } ],
+        path: [ 'syncReturnError' ] },
       { message: 'Error getting syncReturnErrorList1',
-        locations: [ { line: 6, column: 7 } ] },
+        locations: [ { line: 6, column: 7 } ],
+        path: [ 'syncReturnErrorList', 1 ] },
       { message: 'Error getting syncReturnErrorList3',
-        locations: [ { line: 6, column: 7 } ] },
+        locations: [ { line: 6, column: 7 } ],
+        path: [ 'syncReturnErrorList', 3 ] },
       { message: 'Error getting asyncReject',
-        locations: [ { line: 8, column: 7 } ] },
+        locations: [ { line: 8, column: 7 } ],
+        path: [ 'asyncReject' ] },
       { message: 'Error getting asyncRawReject',
-        locations: [ { line: 9, column: 7 } ] },
+        locations: [ { line: 9, column: 7 } ],
+        path: [ 'asyncRawReject' ] },
       { message: 'An unknown error occurred.',
-        locations: [ { line: 10, column: 7 } ] },
+        locations: [ { line: 10, column: 7 } ],
+        path: [ 'asyncEmptyReject' ] },
       { message: 'Error getting asyncError',
-        locations: [ { line: 11, column: 7 } ] },
+        locations: [ { line: 11, column: 7 } ],
+        path: [ 'asyncError' ] },
       { message: 'Error getting asyncRawError',
-        locations: [ { line: 12, column: 7 } ] },
+        locations: [ { line: 12, column: 7 } ],
+        path: [ 'asyncRawError' ] },
       { message: 'Error getting asyncReturnError',
-        locations: [ { line: 13, column: 7 } ] },
+        locations: [ { line: 13, column: 7 } ],
+        path: [ 'asyncReturnError' ] },
     ]);
   });
 
diff --git a/src/execution/__tests__/lists-test.js b/src/execution/__tests__/lists-test.js
index 60f8762879..6985015f94 100644
--- a/src/execution/__tests__/lists-test.js
+++ b/src/execution/__tests__/lists-test.js
@@ -104,7 +104,8 @@ describe('Execute: Accepts any iterable as list value', () => {
     { data: { nest: { test: null } },
       errors: [ {
         message: 'Expected Iterable, but did not find one for field DataType.test.',
-        locations: [ { line: 1, column: 10 } ]
+        locations: [ { line: 1, column: 10 } ],
+        path: [ 'nest', 'test' ]
       } ] }
   ));
 
@@ -157,7 +158,8 @@ describe('Execute: Handles list nullability', () => {
         { data: { nest: { test: null } },
           errors: [
             { message: 'bad',
-              locations: [ { line: 1, column: 10 } ] }
+              locations: [ { line: 1, column: 10 } ],
+              path: [ 'nest', 'test' ] }
           ] }
       ));
 
@@ -180,7 +182,8 @@ describe('Execute: Handles list nullability', () => {
         { data: { nest: { test: [ 1, null, 2 ] } },
           errors: [
             { message: 'bad',
-              locations: [ { line: 1, column: 10 } ] }
+              locations: [ { line: 1, column: 10 } ],
+              path: [ 'nest', 'test', 1 ] }
           ] }
       ));
 
@@ -208,7 +211,8 @@ describe('Execute: Handles list nullability', () => {
         { data: { nest: null },
           errors: [
             { message: 'Cannot return null for non-nullable field DataType.test.',
-              locations: [ { line: 1, column: 10 } ] }
+              locations: [ { line: 1, column: 10 } ],
+              path: [ 'nest', 'test' ] }
           ] }
       ));
 
@@ -231,7 +235,8 @@ describe('Execute: Handles list nullability', () => {
         { data: { nest: null },
           errors: [
             { message: 'Cannot return null for non-nullable field DataType.test.',
-              locations: [ { line: 1, column: 10 } ] }
+              locations: [ { line: 1, column: 10 } ],
+              path: [ 'nest', 'test' ] }
           ] }
       ));
 
@@ -240,7 +245,8 @@ describe('Execute: Handles list nullability', () => {
         { data: { nest: null },
           errors: [
             { message: 'bad',
-              locations: [ { line: 1, column: 10 } ] }
+              locations: [ { line: 1, column: 10 } ],
+              path: [ 'nest', 'test' ] }
           ] }
       ));
 
@@ -263,7 +269,8 @@ describe('Execute: Handles list nullability', () => {
         { data: { nest: { test: [ 1, null, 2 ] } },
           errors: [
             { message: 'bad',
-              locations: [ { line: 1, column: 10 } ] }
+              locations: [ { line: 1, column: 10 } ],
+              path: [ 'nest', 'test', 1 ] }
           ] }
       ));
 
@@ -286,7 +293,8 @@ describe('Execute: Handles list nullability', () => {
         { data: { nest: { test: null } },
           errors: [
             { message: 'Cannot return null for non-nullable field DataType.test.',
-              locations: [ { line: 1, column: 10 } ] }
+              locations: [ { line: 1, column: 10 } ],
+              path: [ 'nest', 'test', 1 ] }
           ] }
       ));
 
@@ -309,7 +317,8 @@ describe('Execute: Handles list nullability', () => {
         { data: { nest: { test: null } },
           errors: [
             { message: 'Cannot return null for non-nullable field DataType.test.',
-              locations: [ { line: 1, column: 10 } ] }
+              locations: [ { line: 1, column: 10 } ],
+              path: [ 'nest', 'test', 1 ] }
           ] }
       ));
 
@@ -323,7 +332,8 @@ describe('Execute: Handles list nullability', () => {
         { data: { nest: { test: null } },
           errors: [
             { message: 'bad',
-              locations: [ { line: 1, column: 10 } ] }
+              locations: [ { line: 1, column: 10 } ],
+              path: [ 'nest', 'test' ] }
           ] }
       ));
 
@@ -341,7 +351,8 @@ describe('Execute: Handles list nullability', () => {
         { data: { nest: { test: null } },
           errors: [
             { message: 'Cannot return null for non-nullable field DataType.test.',
-              locations: [ { line: 1, column: 10 } ] }
+              locations: [ { line: 1, column: 10 } ],
+              path: [ 'nest', 'test', 1 ] }
           ] }
       ));
 
@@ -350,7 +361,8 @@ describe('Execute: Handles list nullability', () => {
         { data: { nest: { test: null } },
           errors: [
             { message: 'bad',
-              locations: [ { line: 1, column: 10 } ] }
+              locations: [ { line: 1, column: 10 } ],
+              path: [ 'nest', 'test', 1 ] }
           ] }
       ));
 
@@ -375,7 +387,8 @@ describe('Execute: Handles list nullability', () => {
         { data: { nest: null },
           errors: [
             { message: 'Cannot return null for non-nullable field DataType.test.',
-              locations: [ { line: 1, column: 10 } ] }
+              locations: [ { line: 1, column: 10 } ],
+              path: [ 'nest', 'test', 1 ] }
           ] }
       ));
 
@@ -384,7 +397,8 @@ describe('Execute: Handles list nullability', () => {
         { data: { nest: null },
           errors: [
             { message: 'Cannot return null for non-nullable field DataType.test.',
-              locations: [ { line: 1, column: 10 } ] }
+              locations: [ { line: 1, column: 10 } ],
+              path: [ 'nest', 'test' ] }
           ] }
       ));
 
@@ -402,7 +416,8 @@ describe('Execute: Handles list nullability', () => {
         { data: { nest: null },
           errors: [
             { message: 'Cannot return null for non-nullable field DataType.test.',
-              locations: [ { line: 1, column: 10 } ] }
+              locations: [ { line: 1, column: 10 } ],
+              path: [ 'nest', 'test', 1 ] }
           ] }
       ));
 
@@ -411,7 +426,8 @@ describe('Execute: Handles list nullability', () => {
         { data: { nest: null },
           errors: [
             { message: 'Cannot return null for non-nullable field DataType.test.',
-              locations: [ { line: 1, column: 10 } ] }
+              locations: [ { line: 1, column: 10 } ],
+              path: [ 'nest', 'test' ] }
           ] }
       ));
 
@@ -420,7 +436,8 @@ describe('Execute: Handles list nullability', () => {
         { data: { nest: null },
           errors: [
             { message: 'bad',
-              locations: [ { line: 1, column: 10 } ] }
+              locations: [ { line: 1, column: 10 } ],
+              path: [ 'nest', 'test' ] }
           ] }
       ));
 
@@ -438,7 +455,8 @@ describe('Execute: Handles list nullability', () => {
         { data: { nest: null },
           errors: [
             { message: 'Cannot return null for non-nullable field DataType.test.',
-              locations: [ { line: 1, column: 10 } ] }
+              locations: [ { line: 1, column: 10 } ],
+              path: [ 'nest', 'test', 1 ] }
           ] }
       ));
 
@@ -447,7 +465,8 @@ describe('Execute: Handles list nullability', () => {
         { data: { nest: null },
           errors: [
             { message: 'bad',
-              locations: [ { line: 1, column: 10 } ] }
+              locations: [ { line: 1, column: 10 } ],
+              path: [ 'nest', 'test', 1 ] }
           ] }
       ));
 
diff --git a/src/validation/__tests__/ArgumentsOfCorrectType-test.js b/src/validation/__tests__/ArgumentsOfCorrectType-test.js
index 3636c63683..18e7086607 100644
--- a/src/validation/__tests__/ArgumentsOfCorrectType-test.js
+++ b/src/validation/__tests__/ArgumentsOfCorrectType-test.js
@@ -27,6 +27,7 @@ function badValue(argName, typeName, value, line, column, errors) {
   return {
     message: badValueMessage(argName, typeName, value, realErrors),
     locations: [ { line, column } ],
+    path: undefined,
   };
 }
 
diff --git a/src/validation/__tests__/DefaultValuesOfCorrectType-test.js b/src/validation/__tests__/DefaultValuesOfCorrectType-test.js
index e9872d172d..7b0f166f15 100644
--- a/src/validation/__tests__/DefaultValuesOfCorrectType-test.js
+++ b/src/validation/__tests__/DefaultValuesOfCorrectType-test.js
@@ -20,6 +20,7 @@ function defaultForNonNullArg(varName, typeName, guessTypeName, line, column) {
   return {
     message: defaultForNonNullArgMessage(varName, typeName, guessTypeName),
     locations: [ { line, column } ],
+    path: undefined,
   };
 }
 
@@ -35,6 +36,7 @@ function badValue(varName, typeName, val, line, column, errors) {
   return {
     message: badValueForDefaultArgMessage(varName, typeName, val, realErrors),
     locations: [ { line, column } ],
+    path: undefined,
   };
 }
 
diff --git a/src/validation/__tests__/FieldsOnCorrectType-test.js b/src/validation/__tests__/FieldsOnCorrectType-test.js
index 6769caa267..1a52a57885 100644
--- a/src/validation/__tests__/FieldsOnCorrectType-test.js
+++ b/src/validation/__tests__/FieldsOnCorrectType-test.js
@@ -32,6 +32,7 @@ function undefinedField(
       suggestedFields
     ),
     locations: [ { line, column } ],
+    path: undefined,
   };
 }
 
diff --git a/src/validation/__tests__/FragmentsOnCompositeTypes-test.js b/src/validation/__tests__/FragmentsOnCompositeTypes-test.js
index 05e894d74a..2498de0166 100644
--- a/src/validation/__tests__/FragmentsOnCompositeTypes-test.js
+++ b/src/validation/__tests__/FragmentsOnCompositeTypes-test.js
@@ -19,6 +19,7 @@ function error(fragName, typeName, line, column) {
   return {
     message: fragmentOnNonCompositeErrorMessage(fragName, typeName),
     locations: [ { line, column } ],
+    path: undefined,
   };
 }
 
@@ -101,7 +102,8 @@ describe('Validate: Fragments on composite types', () => {
       }
     `, [
       { message: inlineFragmentOnNonCompositeErrorMessage('String'),
-        locations: [ { line: 3, column: 16 } ] }
+        locations: [ { line: 3, column: 16 } ],
+        path: undefined }
     ]);
   });
 
diff --git a/src/validation/__tests__/KnownArgumentNames-test.js b/src/validation/__tests__/KnownArgumentNames-test.js
index eeae9cef1f..0b5a082911 100644
--- a/src/validation/__tests__/KnownArgumentNames-test.js
+++ b/src/validation/__tests__/KnownArgumentNames-test.js
@@ -20,6 +20,7 @@ function unknownArg(argName, fieldName, typeName, suggestedArgs, line, column) {
   return {
     message: unknownArgMessage(argName, fieldName, typeName, suggestedArgs),
     locations: [ { line, column } ],
+    path: undefined,
   };
 }
 
@@ -33,6 +34,7 @@ function unknownDirectiveArg(
   return {
     message: unknownDirectiveArgMessage(argName, directiveName, suggestedArgs),
     locations: [ { line, column } ],
+    path: undefined,
   };
 }
 
diff --git a/src/validation/__tests__/KnownDirectives-test.js b/src/validation/__tests__/KnownDirectives-test.js
index 179bf4dc29..992760632d 100644
--- a/src/validation/__tests__/KnownDirectives-test.js
+++ b/src/validation/__tests__/KnownDirectives-test.js
@@ -22,14 +22,16 @@ import {
 function unknownDirective(directiveName, line, column) {
   return {
     message: unknownDirectiveMessage(directiveName),
-    locations: [ { line, column } ]
+    locations: [ { line, column } ],
+    path: undefined,
   };
 }
 
 function misplacedDirective(directiveName, placement, line, column) {
   return {
     message: misplacedDirectiveMessage(directiveName, placement),
-    locations: [ { line, column } ]
+    locations: [ { line, column } ],
+    path: undefined,
   };
 }
 
diff --git a/src/validation/__tests__/KnownFragmentNames-test.js b/src/validation/__tests__/KnownFragmentNames-test.js
index a05016f64f..f823827466 100644
--- a/src/validation/__tests__/KnownFragmentNames-test.js
+++ b/src/validation/__tests__/KnownFragmentNames-test.js
@@ -18,7 +18,8 @@ import {
 function undefFrag(fragName, line, column) {
   return {
     message: unknownFragmentMessage(fragName),
-    locations: [ { line, column } ]
+    locations: [ { line, column } ],
+    path: undefined,
   };
 }
 
diff --git a/src/validation/__tests__/KnownTypeNames-test.js b/src/validation/__tests__/KnownTypeNames-test.js
index eca4a0424c..d10ba6d50c 100644
--- a/src/validation/__tests__/KnownTypeNames-test.js
+++ b/src/validation/__tests__/KnownTypeNames-test.js
@@ -19,6 +19,7 @@ function unknownType(typeName, suggestedTypes, line, column) {
   return {
     message: unknownTypeMessage(typeName, suggestedTypes),
     locations: [ { line, column } ],
+    path: undefined,
   };
 }
 
diff --git a/src/validation/__tests__/LoneAnonymousOperation-test.js b/src/validation/__tests__/LoneAnonymousOperation-test.js
index 9f66c721f0..7d740a31d1 100644
--- a/src/validation/__tests__/LoneAnonymousOperation-test.js
+++ b/src/validation/__tests__/LoneAnonymousOperation-test.js
@@ -19,6 +19,7 @@ function anonNotAlone(line, column) {
   return {
     message: anonOperationNotAloneMessage(),
     locations: [ { line, column } ],
+    path: undefined,
   };
 }
 
diff --git a/src/validation/__tests__/NoFragmentCycles-test.js b/src/validation/__tests__/NoFragmentCycles-test.js
index 13e80615d2..ce12a82c2a 100644
--- a/src/validation/__tests__/NoFragmentCycles-test.js
+++ b/src/validation/__tests__/NoFragmentCycles-test.js
@@ -63,7 +63,8 @@ describe('Validate: No circular fragment spreads', () => {
       fragment fragA on Human { relatives { ...fragA } },
     `, [
       { message: cycleErrorMessage('fragA', []),
-        locations: [ { line: 2, column: 45 } ] }
+        locations: [ { line: 2, column: 45 } ],
+        path: undefined }
     ]);
   });
 
@@ -72,7 +73,8 @@ describe('Validate: No circular fragment spreads', () => {
       fragment fragA on Dog { ...fragA }
     `, [
       { message: cycleErrorMessage('fragA', []),
-        locations: [ { line: 2, column: 31 } ] }
+        locations: [ { line: 2, column: 31 } ],
+        path: undefined }
     ]);
   });
 
@@ -85,7 +87,8 @@ describe('Validate: No circular fragment spreads', () => {
       }
     `, [
       { message: cycleErrorMessage('fragA', []),
-        locations: [ { line: 4, column: 11 } ] }
+        locations: [ { line: 4, column: 11 } ],
+        path: undefined }
     ]);
   });
 
@@ -95,7 +98,8 @@ describe('Validate: No circular fragment spreads', () => {
       fragment fragB on Dog { ...fragA }
     `, [
       { message: cycleErrorMessage('fragA', [ 'fragB' ]),
-        locations: [ { line: 2, column: 31 }, { line: 3, column: 31 } ] }
+        locations: [ { line: 2, column: 31 }, { line: 3, column: 31 } ],
+        path: undefined }
     ]);
   });
 
@@ -105,7 +109,8 @@ describe('Validate: No circular fragment spreads', () => {
       fragment fragA on Dog { ...fragB }
     `, [
       { message: cycleErrorMessage('fragB', [ 'fragA' ]),
-        locations: [ { line: 2, column: 31 }, { line: 3, column: 31 } ] }
+        locations: [ { line: 2, column: 31 }, { line: 3, column: 31 } ],
+        path: undefined }
     ]);
   });
 
@@ -124,7 +129,8 @@ describe('Validate: No circular fragment spreads', () => {
       }
     `, [
       { message: cycleErrorMessage('fragA', [ 'fragB' ]),
-        locations: [ { line: 4, column: 11 }, { line: 9, column: 11 } ] }
+        locations: [ { line: 4, column: 11 }, { line: 9, column: 11 } ],
+        path: undefined }
     ]);
   });
 
@@ -146,7 +152,8 @@ describe('Validate: No circular fragment spreads', () => {
           { line: 3, column: 31 },
           { line: 4, column: 31 },
           { line: 8, column: 31 },
-          { line: 9, column: 31 } ] },
+          { line: 9, column: 31 } ],
+        path: undefined },
       { message:
           cycleErrorMessage('fragO', [ 'fragP', 'fragX', 'fragY', 'fragZ' ]),
         locations: [
@@ -154,7 +161,8 @@ describe('Validate: No circular fragment spreads', () => {
           { line: 9, column: 41 },
           { line: 5, column: 31 },
           { line: 6, column: 31 },
-          { line: 7, column: 31 } ] }
+          { line: 7, column: 31 } ],
+        path: undefined }
     ]);
   });
 
@@ -165,9 +173,11 @@ describe('Validate: No circular fragment spreads', () => {
       fragment fragC on Dog { ...fragA }
     `, [
       { message: cycleErrorMessage('fragA', [ 'fragB' ]),
-        locations: [ { line: 2, column: 31 }, { line: 3, column: 31 } ] },
+        locations: [ { line: 2, column: 31 }, { line: 3, column: 31 } ],
+        path: undefined },
       { message: cycleErrorMessage('fragA', [ 'fragC' ]),
-        locations: [ { line: 2, column: 41 }, { line: 4, column: 31 } ] }
+        locations: [ { line: 2, column: 41 }, { line: 4, column: 31 } ],
+        path: undefined }
     ]);
   });
 
@@ -178,9 +188,11 @@ describe('Validate: No circular fragment spreads', () => {
       fragment fragC on Dog { ...fragA, ...fragB }
     `, [
       { message: cycleErrorMessage('fragA', [ 'fragC' ]),
-        locations: [ { line: 2, column: 31 }, { line: 4, column: 31 } ] },
+        locations: [ { line: 2, column: 31 }, { line: 4, column: 31 } ],
+        path: undefined },
       { message: cycleErrorMessage('fragC', [ 'fragB' ]),
-        locations: [ { line: 4, column: 41 }, { line: 3, column: 31 } ] }
+        locations: [ { line: 4, column: 41 }, { line: 3, column: 31 } ],
+        path: undefined }
     ]);
   });
 
@@ -191,14 +203,17 @@ describe('Validate: No circular fragment spreads', () => {
       fragment fragC on Dog { ...fragA, ...fragB }
     `, [
       { message: cycleErrorMessage('fragB', []),
-        locations: [ { line: 3, column: 31 } ] },
+        locations: [ { line: 3, column: 31 } ],
+        path: undefined },
       { message: cycleErrorMessage('fragA', [ 'fragB', 'fragC' ]),
         locations: [
           { line: 2, column: 31 },
           { line: 3, column: 41 },
-          { line: 4, column: 31 } ] },
+          { line: 4, column: 31 } ],
+        path: undefined },
       { message: cycleErrorMessage('fragB', [ 'fragC' ]),
-        locations: [ { line: 3, column: 41 }, { line: 4, column: 41 } ] }
+        locations: [ { line: 3, column: 41 }, { line: 4, column: 41 } ],
+        path: undefined }
     ]);
   });
 
diff --git a/src/validation/__tests__/NoUndefinedVariables-test.js b/src/validation/__tests__/NoUndefinedVariables-test.js
index 9ebf5a0594..dae6982823 100644
--- a/src/validation/__tests__/NoUndefinedVariables-test.js
+++ b/src/validation/__tests__/NoUndefinedVariables-test.js
@@ -19,6 +19,7 @@ function undefVar(varName, l1, c1, opName, l2, c2) {
   return {
     message: undefinedVarMessage(varName, opName),
     locations: [ { line: l1, column: c1 }, { line: l2, column: c2 } ],
+    path: undefined,
   };
 }
 
diff --git a/src/validation/__tests__/NoUnusedFragments-test.js b/src/validation/__tests__/NoUnusedFragments-test.js
index 6e3717623a..4b932871d6 100644
--- a/src/validation/__tests__/NoUnusedFragments-test.js
+++ b/src/validation/__tests__/NoUnusedFragments-test.js
@@ -19,6 +19,7 @@ function unusedFrag(fragName, line, column) {
   return {
     message: unusedFragMessage(fragName),
     locations: [ { line, column } ],
+    path: undefined,
   };
 }
 
diff --git a/src/validation/__tests__/NoUnusedVariables-test.js b/src/validation/__tests__/NoUnusedVariables-test.js
index 424f3bfec5..1a959887f8 100644
--- a/src/validation/__tests__/NoUnusedVariables-test.js
+++ b/src/validation/__tests__/NoUnusedVariables-test.js
@@ -19,6 +19,7 @@ function unusedVar(varName, opName, line, column) {
   return {
     message: unusedVariableMessage(varName, opName),
     locations: [ { line, column } ],
+    path: undefined,
   };
 }
 
diff --git a/src/validation/__tests__/OverlappingFieldsCanBeMerged-test.js b/src/validation/__tests__/OverlappingFieldsCanBeMerged-test.js
index 3da107a50d..ecbb3f9a1d 100644
--- a/src/validation/__tests__/OverlappingFieldsCanBeMerged-test.js
+++ b/src/validation/__tests__/OverlappingFieldsCanBeMerged-test.js
@@ -109,7 +109,8 @@ describe('Validate: Overlapping fields can be merged', () => {
           'fido',
           'name and nickname are different fields'
         ),
-        locations: [ { line: 3, column: 9 }, { line: 4, column: 9 } ] },
+        locations: [ { line: 3, column: 9 }, { line: 4, column: 9 } ],
+        path: undefined }
     ]);
   });
 
@@ -139,7 +140,8 @@ describe('Validate: Overlapping fields can be merged', () => {
           'name',
           'nickname and name are different fields'
         ),
-        locations: [ { line: 3, column: 9 }, { line: 4, column: 9 } ] },
+        locations: [ { line: 3, column: 9 }, { line: 4, column: 9 } ],
+        path: undefined }
     ]);
   });
 
@@ -154,7 +156,8 @@ describe('Validate: Overlapping fields can be merged', () => {
           'doesKnowCommand',
           'they have differing arguments'
         ),
-        locations: [ { line: 3, column: 9 }, { line: 4, column: 9 } ] }
+        locations: [ { line: 3, column: 9 }, { line: 4, column: 9 } ],
+        path: undefined }
     ]);
   });
 
@@ -169,7 +172,8 @@ describe('Validate: Overlapping fields can be merged', () => {
           'doesKnowCommand',
           'they have differing arguments'
         ),
-        locations: [ { line: 3, column: 9 }, { line: 4, column: 9 } ] }
+        locations: [ { line: 3, column: 9 }, { line: 4, column: 9 } ],
+        path: undefined }
     ]);
   });
 
@@ -184,7 +188,8 @@ describe('Validate: Overlapping fields can be merged', () => {
           'doesKnowCommand',
           'they have differing arguments'
         ),
-        locations: [ { line: 3, column: 9 }, { line: 4, column: 9 } ] }
+        locations: [ { line: 3, column: 9 }, { line: 4, column: 9 } ],
+        path: undefined }
     ]);
   });
 
@@ -217,7 +222,8 @@ describe('Validate: Overlapping fields can be merged', () => {
       }
     `, [
       { message: fieldsConflictMessage('x', 'a and b are different fields'),
-        locations: [ { line: 7, column: 9 }, { line: 10, column: 9 } ] }
+        locations: [ { line: 7, column: 9 }, { line: 10, column: 9 } ],
+        path: undefined }
     ]);
   });
 
@@ -246,11 +252,14 @@ describe('Validate: Overlapping fields can be merged', () => {
       }
     `, [
       { message: fieldsConflictMessage('x', 'a and b are different fields'),
-        locations: [ { line: 18, column: 9 }, { line: 21, column: 9 } ] },
+        locations: [ { line: 18, column: 9 }, { line: 21, column: 9 } ],
+        path: undefined },
       { message: fieldsConflictMessage('x', 'c and a are different fields'),
-        locations: [ { line: 14, column: 11 }, { line: 18, column: 9 } ] },
+        locations: [ { line: 14, column: 11 }, { line: 18, column: 9 } ],
+        path: undefined },
       { message: fieldsConflictMessage('x', 'c and b are different fields'),
-        locations: [ { line: 14, column: 11 }, { line: 21, column: 9 } ] }
+        locations: [ { line: 14, column: 11 }, { line: 21, column: 9 } ],
+        path: undefined }
     ]);
   });
 
@@ -272,7 +281,8 @@ describe('Validate: Overlapping fields can be merged', () => {
           { line: 3, column: 9 },
           { line: 4, column: 11 },
           { line: 6, column: 9 },
-          { line: 7, column: 11 } ] },
+          { line: 7, column: 11 } ],
+        path: undefined },
     ]);
   });
 
@@ -301,7 +311,8 @@ describe('Validate: Overlapping fields can be merged', () => {
           { line: 5, column: 11 },
           { line: 7, column: 9 },
           { line: 8, column: 11 },
-          { line: 9, column: 11 } ] },
+          { line: 9, column: 11 } ],
+        path: undefined },
     ]);
   });
 
@@ -330,7 +341,8 @@ describe('Validate: Overlapping fields can be merged', () => {
           { line: 5, column: 13 },
           { line: 8, column: 9 },
           { line: 9, column: 11 },
-          { line: 10, column: 13 } ] },
+          { line: 10, column: 13 } ],
+        path: undefined },
     ]);
   });
 
@@ -359,7 +371,8 @@ describe('Validate: Overlapping fields can be merged', () => {
           { line: 4, column: 11 },
           { line: 5, column: 13 },
           { line: 7, column: 11 },
-          { line: 8, column: 13 } ] },
+          { line: 8, column: 13 } ],
+        path: undefined },
     ]);
   });
 
@@ -396,7 +409,8 @@ describe('Validate: Overlapping fields can be merged', () => {
           { line: 12, column: 11 },
           { line: 13, column: 13 },
           { line: 15, column: 11 },
-          { line: 16, column: 13 } ] },
+          { line: 16, column: 13 } ],
+        path: undefined },
     ]);
   });
 
@@ -435,7 +449,8 @@ describe('Validate: Overlapping fields can be merged', () => {
           { line: 15, column: 9 },
           { line: 6, column: 9 },
           { line: 22, column: 9 },
-          { line: 18, column: 9 } ] },
+          { line: 18, column: 9 } ],
+        path: undefined },
     ]);
   });
 
@@ -581,7 +596,8 @@ describe('Validate: Overlapping fields can be merged', () => {
             'scalar',
             'they return conflicting types Int and String!'
           ),
-          locations: [ { line: 5, column: 15 }, { line: 8, column: 15 } ] }
+          locations: [ { line: 5, column: 15 }, { line: 8, column: 15 } ],
+          path: undefined }
       ]);
     });
 
@@ -624,7 +640,8 @@ describe('Validate: Overlapping fields can be merged', () => {
             'scalar',
             'they return conflicting types Int and String'
           ),
-          locations: [ { line: 5, column: 15 }, { line: 8, column: 15 } ] }
+          locations: [ { line: 5, column: 15 }, { line: 8, column: 15 } ],
+          path: undefined }
       ]);
     });
 
@@ -682,7 +699,8 @@ describe('Validate: Overlapping fields can be merged', () => {
             { line: 39, column: 11 },
             { line: 34, column: 11 },
             { line: 42, column: 11 },
-          ] }
+          ],
+          path: undefined }
       ]);
     });
 
@@ -703,7 +721,8 @@ describe('Validate: Overlapping fields can be merged', () => {
             'scalar',
             'they return conflicting types String! and String'
           ),
-          locations: [ { line: 5, column: 15 }, { line: 8, column: 15 } ] }
+          locations: [ { line: 5, column: 15 }, { line: 8, column: 15 } ],
+          path: undefined }
       ]);
     });
 
@@ -728,7 +747,8 @@ describe('Validate: Overlapping fields can be merged', () => {
             'box',
             'they return conflicting types [StringBox] and StringBox'
           ),
-          locations: [ { line: 5, column: 15 }, { line: 10, column: 15 } ] }
+          locations: [ { line: 5, column: 15 }, { line: 10, column: 15 } ],
+          path: undefined }
       ]);
 
       expectFailsRuleWithSchema(schema, OverlappingFieldsCanBeMerged, `
@@ -751,7 +771,8 @@ describe('Validate: Overlapping fields can be merged', () => {
             'box',
             'they return conflicting types StringBox and [StringBox]'
           ),
-          locations: [ { line: 5, column: 15 }, { line: 10, column: 15 } ] }
+          locations: [ { line: 5, column: 15 }, { line: 10, column: 15 } ],
+          path: undefined }
       ]);
     });
 
@@ -777,7 +798,8 @@ describe('Validate: Overlapping fields can be merged', () => {
             'val',
             'scalar and unrelatedField are different fields'
           ),
-          locations: [ { line: 6, column: 17 }, { line: 7, column: 17 } ] }
+          locations: [ { line: 6, column: 17 }, { line: 7, column: 17 } ],
+          path: undefined }
       ]);
     });
 
@@ -806,7 +828,8 @@ describe('Validate: Overlapping fields can be merged', () => {
             { line: 5, column: 15 },
             { line: 6, column: 17 },
             { line: 10, column: 15 },
-            { line: 11, column: 17 } ] }
+            { line: 11, column: 17 } ],
+          path: undefined }
       ]);
     });
 
@@ -883,7 +906,8 @@ describe('Validate: Overlapping fields can be merged', () => {
             { line: 14, column: 11 },
             { line: 15, column: 13 },
             { line: 16, column: 15 },
-          ] }
+          ],
+          path: undefined }
       ]);
     });
 
diff --git a/src/validation/__tests__/PossibleFragmentSpreads-test.js b/src/validation/__tests__/PossibleFragmentSpreads-test.js
index 2ae10608c1..00c0f2f25c 100644
--- a/src/validation/__tests__/PossibleFragmentSpreads-test.js
+++ b/src/validation/__tests__/PossibleFragmentSpreads-test.js
@@ -20,6 +20,7 @@ function error(fragName, parentType, fragType, line, column) {
   return {
     message: typeIncompatibleSpreadMessage(fragName, parentType, fragType),
     locations: [ { line, column } ],
+    path: undefined,
   };
 }
 
@@ -27,6 +28,7 @@ function errorAnon(parentType, fragType, line, column) {
   return {
     message: typeIncompatibleAnonSpreadMessage(parentType, fragType),
     locations: [ { line, column } ],
+    path: undefined,
   };
 }
 
diff --git a/src/validation/__tests__/ProvidedNonNullArguments-test.js b/src/validation/__tests__/ProvidedNonNullArguments-test.js
index 8c4ed83f3b..7fa432d3f4 100644
--- a/src/validation/__tests__/ProvidedNonNullArguments-test.js
+++ b/src/validation/__tests__/ProvidedNonNullArguments-test.js
@@ -20,6 +20,7 @@ function missingFieldArg(fieldName, argName, typeName, line, column) {
   return {
     message: missingFieldArgMessage(fieldName, argName, typeName),
     locations: [ { line, column } ],
+    path: undefined,
   };
 }
 
@@ -27,6 +28,7 @@ function missingDirectiveArg(directiveName, argName, typeName, line, column) {
   return {
     message: missingDirectiveArgMessage(directiveName, argName, typeName),
     locations: [ { line, column } ],
+    path: undefined,
   };
 }
 
diff --git a/src/validation/__tests__/ScalarLeafs-test.js b/src/validation/__tests__/ScalarLeafs-test.js
index e3fe768f75..cfa0c19417 100644
--- a/src/validation/__tests__/ScalarLeafs-test.js
+++ b/src/validation/__tests__/ScalarLeafs-test.js
@@ -20,6 +20,7 @@ function noScalarSubselection(field, type, line, column) {
   return {
     message: noSubselectionAllowedMessage(field, type),
     locations: [ { line, column } ],
+    path: undefined,
   };
 }
 
@@ -27,6 +28,7 @@ function missingObjSubselection(field, type, line, column) {
   return {
     message: requiredSubselectionMessage(field, type),
     locations: [ { line, column } ],
+    path: undefined,
   };
 }
 
diff --git a/src/validation/__tests__/UniqueArgumentNames-test.js b/src/validation/__tests__/UniqueArgumentNames-test.js
index 1fb7e9a9f3..e95d4db4af 100644
--- a/src/validation/__tests__/UniqueArgumentNames-test.js
+++ b/src/validation/__tests__/UniqueArgumentNames-test.js
@@ -19,6 +19,7 @@ function duplicateArg(argName, l1, c1, l2, c2) {
   return {
     message: duplicateArgMessage(argName),
     locations: [ { line: l1, column: c1 }, { line: l2, column: c2 } ],
+    path: undefined,
   };
 }
 
diff --git a/src/validation/__tests__/UniqueDirectivesPerLocation-test.js b/src/validation/__tests__/UniqueDirectivesPerLocation-test.js
index dc1311d250..375e88c4fb 100644
--- a/src/validation/__tests__/UniqueDirectivesPerLocation-test.js
+++ b/src/validation/__tests__/UniqueDirectivesPerLocation-test.js
@@ -19,6 +19,7 @@ function duplicateDirective(directiveName, l1, c1, l2, c2) {
   return {
     message: duplicateDirectiveMessage(directiveName),
     locations: [ { line: l1, column: c1 }, { line: l2, column: c2 } ],
+    path: undefined,
   };
 }
 
diff --git a/src/validation/__tests__/UniqueFragmentNames-test.js b/src/validation/__tests__/UniqueFragmentNames-test.js
index bb22472b6c..14a5e547c2 100644
--- a/src/validation/__tests__/UniqueFragmentNames-test.js
+++ b/src/validation/__tests__/UniqueFragmentNames-test.js
@@ -19,6 +19,7 @@ function duplicateFrag(fragName, l1, c1, l2, c2) {
   return {
     message: duplicateFragmentNameMessage(fragName),
     locations: [ { line: l1, column: c1 }, { line: l2, column: c2 } ],
+    path: undefined,
   };
 }
 
diff --git a/src/validation/__tests__/UniqueInputFieldNames-test.js b/src/validation/__tests__/UniqueInputFieldNames-test.js
index 6ed4f535c0..7ab74b7052 100644
--- a/src/validation/__tests__/UniqueInputFieldNames-test.js
+++ b/src/validation/__tests__/UniqueInputFieldNames-test.js
@@ -19,6 +19,7 @@ function duplicateField(name, l1, c1, l2, c2) {
   return {
     message: duplicateInputFieldMessage(name),
     locations: [ { line: l1, column: c1 }, { line: l2, column: c2 } ],
+    path: undefined,
   };
 }
 
diff --git a/src/validation/__tests__/UniqueOperationNames-test.js b/src/validation/__tests__/UniqueOperationNames-test.js
index 6a9a1a1c9f..2628d51b80 100644
--- a/src/validation/__tests__/UniqueOperationNames-test.js
+++ b/src/validation/__tests__/UniqueOperationNames-test.js
@@ -19,6 +19,7 @@ function duplicateOp(opName, l1, c1, l2, c2) {
   return {
     message: duplicateOperationNameMessage(opName),
     locations: [ { line: l1, column: c1 }, { line: l2, column: c2 } ],
+    path: undefined,
   };
 }
 
diff --git a/src/validation/__tests__/UniqueVariableNames-test.js b/src/validation/__tests__/UniqueVariableNames-test.js
index f5b170b6c4..74e95fc4d7 100644
--- a/src/validation/__tests__/UniqueVariableNames-test.js
+++ b/src/validation/__tests__/UniqueVariableNames-test.js
@@ -19,6 +19,7 @@ function duplicateVariable(name, l1, c1, l2, c2) {
   return {
     message: duplicateVariableMessage(name),
     locations: [ { line: l1, column: c1 }, { line: l2, column: c2 } ],
+    path: undefined,
   };
 }
 
diff --git a/src/validation/__tests__/VariablesAreInputTypes-test.js b/src/validation/__tests__/VariablesAreInputTypes-test.js
index a9acc99449..4f573b26d7 100644
--- a/src/validation/__tests__/VariablesAreInputTypes-test.js
+++ b/src/validation/__tests__/VariablesAreInputTypes-test.js
@@ -32,11 +32,14 @@ describe('Validate: Variables are input types', () => {
       }
     `, [
       { locations: [ { line: 2, column: 21 } ],
-        message: nonInputTypeOnVarMessage('a', 'Dog') },
+        message: nonInputTypeOnVarMessage('a', 'Dog'),
+        path: undefined },
       { locations: [ { line: 2, column: 30 } ],
-        message: nonInputTypeOnVarMessage('b', '[[CatOrDog!]]!') },
+        message: nonInputTypeOnVarMessage('b', '[[CatOrDog!]]!'),
+        path: undefined },
       { locations: [ { line: 2, column: 50 } ],
-        message: nonInputTypeOnVarMessage('c', 'Pet') },
+        message: nonInputTypeOnVarMessage('c', 'Pet'),
+        path: undefined },
     ]);
   });
 
diff --git a/src/validation/__tests__/VariablesInAllowedPosition-test.js b/src/validation/__tests__/VariablesInAllowedPosition-test.js
index d69047742d..bfd12ee2b2 100644
--- a/src/validation/__tests__/VariablesInAllowedPosition-test.js
+++ b/src/validation/__tests__/VariablesInAllowedPosition-test.js
@@ -184,7 +184,8 @@ describe('Validate: Variables are in allowed positions', () => {
       }
     `, [
       { message: badVarPosMessage('intArg', 'Int', 'Int!'),
-        locations: [ { line: 2, column: 19 }, { line: 4, column: 45 } ] },
+        locations: [ { line: 2, column: 19 }, { line: 4, column: 45 } ],
+        path: undefined }
     ]);
   });
 
@@ -201,7 +202,8 @@ describe('Validate: Variables are in allowed positions', () => {
       }
     `, [
       { message: badVarPosMessage('intArg', 'Int', 'Int!'),
-        locations: [ { line: 6, column: 19 }, { line: 3, column: 43 } ] }
+        locations: [ { line: 6, column: 19 }, { line: 3, column: 43 } ],
+        path: undefined }
     ]);
   });
 
@@ -222,7 +224,8 @@ describe('Validate: Variables are in allowed positions', () => {
       }
     `, [
       { message: badVarPosMessage('intArg', 'Int', 'Int!'),
-        locations: [ { line: 10, column: 19 }, { line: 7, column: 43 } ] }
+        locations: [ { line: 10, column: 19 }, { line: 7, column: 43 } ],
+        path: undefined }
     ]);
   });
 
@@ -235,7 +238,8 @@ describe('Validate: Variables are in allowed positions', () => {
       }
     `, [
       { message: badVarPosMessage('stringVar', 'String', 'Boolean'),
-        locations: [ { line: 2, column: 19 }, { line: 4, column: 39 } ] }
+        locations: [ { line: 2, column: 19 }, { line: 4, column: 39 } ],
+        path: undefined }
     ]);
   });
 
@@ -248,7 +252,8 @@ describe('Validate: Variables are in allowed positions', () => {
       }
     `, [
       { message: badVarPosMessage('stringVar', 'String', '[String]'),
-        locations: [ { line: 2, column: 19 }, { line: 4, column: 45 } ] }
+        locations: [ { line: 2, column: 19 }, { line: 4, column: 45 } ],
+        path: undefined }
     ]);
   });
 
@@ -259,7 +264,8 @@ describe('Validate: Variables are in allowed positions', () => {
       }
     `, [
       { message: badVarPosMessage('boolVar', 'Boolean', 'Boolean!'),
-        locations: [ { line: 2, column: 19 }, { line: 3, column: 26 } ] }
+        locations: [ { line: 2, column: 19 }, { line: 3, column: 26 } ],
+        path: undefined }
     ]);
   });
 
@@ -270,7 +276,8 @@ describe('Validate: Variables are in allowed positions', () => {
       }
     `, [
       { message: badVarPosMessage('stringVar', 'String', 'Boolean!'),
-        locations: [ { line: 2, column: 19 }, { line: 3, column: 26 } ] }
+        locations: [ { line: 2, column: 19 }, { line: 3, column: 26 } ],
+        path: undefined }
     ]);
   });