diff --git a/src/index.js b/src/index.js
index 46133b23db..5a2c79eb96 100644
--- a/src/index.js
+++ b/src/index.js
@@ -403,8 +403,7 @@ export {
   // Compares two GraphQLSchemas and detects breaking changes.
   BreakingChangeType,
   DangerousChangeType,
-  findBreakingChanges,
-  findDangerousChanges,
+  findSchemaChanges,
   // Report all deprecated usage within a GraphQL document.
   findDeprecatedUsages,
 } from './utilities';
@@ -433,6 +432,5 @@ export type {
   IntrospectionEnumValue,
   IntrospectionDirective,
   BuildSchemaOptions,
-  BreakingChange,
-  DangerousChange,
+  SchemaChange,
 } from './utilities';
diff --git a/src/utilities/__tests__/findBreakingChanges-test.js b/src/utilities/__tests__/findBreakingChanges-test.js
index ddb0cf9c1a..5eaafdba5b 100644
--- a/src/utilities/__tests__/findBreakingChanges-test.js
+++ b/src/utilities/__tests__/findBreakingChanges-test.js
@@ -14,11 +14,10 @@ import { buildSchema } from '../buildASTSchema';
 import {
   BreakingChangeType,
   DangerousChangeType,
-  findBreakingChanges,
-  findDangerousChanges,
+  findSchemaChanges,
 } from '../findBreakingChanges';
 
-describe('findBreakingChanges', () => {
+describe('findSchemaChanges', () => {
   it('should detect if a type was removed or not', () => {
     const oldSchema = buildSchema(`
       type Type1
@@ -28,13 +27,13 @@ describe('findBreakingChanges', () => {
     const newSchema = buildSchema(`
       type Type2
     `);
-    expect(findBreakingChanges(oldSchema, newSchema)).to.deep.equal([
+    expect(findSchemaChanges(oldSchema, newSchema)).to.deep.equal([
       {
         type: BreakingChangeType.TYPE_REMOVED,
         description: 'Type1 was removed.',
       },
     ]);
-    expect(findBreakingChanges(oldSchema, oldSchema)).to.deep.equal([]);
+    expect(findSchemaChanges(oldSchema, oldSchema)).to.deep.equal([]);
   });
 
   it('should detect if a type changed its type', () => {
@@ -49,7 +48,7 @@ describe('findBreakingChanges', () => {
       union TypeWasInterfaceBecomesUnion
       input TypeWasObjectBecomesInputObject
     `);
-    expect(findBreakingChanges(oldSchema, newSchema)).to.deep.equal([
+    expect(findSchemaChanges(oldSchema, newSchema)).to.deep.equal([
       {
         type: BreakingChangeType.TYPE_CHANGED_KIND,
         description:
@@ -119,7 +118,7 @@ describe('findBreakingChanges', () => {
       }
     `);
 
-    const changes = findBreakingChanges(oldSchema, newSchema);
+    const changes = findSchemaChanges(oldSchema, newSchema);
     expect(changes).to.deep.equal([
       {
         type: BreakingChangeType.FIELD_REMOVED,
@@ -216,7 +215,7 @@ describe('findBreakingChanges', () => {
       }
     `);
 
-    expect(findBreakingChanges(oldSchema, newSchema)).to.deep.equal([
+    expect(findSchemaChanges(oldSchema, newSchema)).to.deep.equal([
       {
         type: BreakingChangeType.FIELD_REMOVED,
         description: 'InputType1.field2 was removed.',
@@ -281,12 +280,22 @@ describe('findBreakingChanges', () => {
       }
     `);
 
-    expect(findBreakingChanges(oldSchema, newSchema)).to.deep.equal([
+    expect(findSchemaChanges(oldSchema, newSchema)).to.deep.equal([
       {
         type: BreakingChangeType.REQUIRED_INPUT_FIELD_ADDED,
         description:
           'A required field requiredField on input type InputType1 was added.',
       },
+      {
+        description:
+          'An optional field optionalField1 on input type InputType1 was added.',
+        type: 'OPTIONAL_INPUT_FIELD_ADDED',
+      },
+      {
+        description:
+          'An optional field optionalField2 on input type InputType1 was added.',
+        type: 'OPTIONAL_INPUT_FIELD_ADDED',
+      },
     ]);
   });
 
@@ -306,7 +315,11 @@ describe('findBreakingChanges', () => {
       union UnionType1 = Type1 | Type3
     `);
 
-    expect(findBreakingChanges(oldSchema, newSchema)).to.deep.equal([
+    expect(findSchemaChanges(oldSchema, newSchema)).to.deep.equal([
+      {
+        description: 'Type3 was added to union type UnionType1.',
+        type: 'TYPE_ADDED_TO_UNION',
+      },
       {
         type: BreakingChangeType.TYPE_REMOVED_FROM_UNION,
         description: 'Type2 was removed from union type UnionType1.',
@@ -331,7 +344,11 @@ describe('findBreakingChanges', () => {
       }
     `);
 
-    expect(findBreakingChanges(oldSchema, newSchema)).to.deep.equal([
+    expect(findSchemaChanges(oldSchema, newSchema)).to.deep.equal([
+      {
+        description: 'VALUE3 was added to enum type EnumType1.',
+        type: 'VALUE_ADDED_TO_ENUM',
+      },
       {
         type: BreakingChangeType.VALUE_REMOVED_FROM_ENUM,
         description: 'VALUE1 was removed from enum type EnumType1.',
@@ -360,7 +377,7 @@ describe('findBreakingChanges', () => {
       }
     `);
 
-    expect(findBreakingChanges(oldSchema, newSchema)).to.deep.equal([
+    expect(findSchemaChanges(oldSchema, newSchema)).to.deep.equal([
       {
         type: BreakingChangeType.ARG_REMOVED,
         description: 'Interface1.field1 arg arg1 was removed.',
@@ -421,7 +438,7 @@ describe('findBreakingChanges', () => {
       }
     `);
 
-    expect(findBreakingChanges(oldSchema, newSchema)).to.deep.equal([
+    expect(findSchemaChanges(oldSchema, newSchema)).to.deep.equal([
       {
         type: BreakingChangeType.ARG_CHANGED_KIND,
         description:
@@ -503,11 +520,21 @@ describe('findBreakingChanges', () => {
       }
     `);
 
-    expect(findBreakingChanges(oldSchema, newSchema)).to.deep.equal([
+    expect(findSchemaChanges(oldSchema, newSchema)).to.deep.equal([
       {
         type: BreakingChangeType.REQUIRED_ARG_ADDED,
         description: 'A required arg newRequiredArg on Type1.field1 was added.',
       },
+      {
+        description:
+          'An optional arg newOptionalArg1 on Type1.field1 was added.',
+        type: 'OPTIONAL_ARG_ADDED',
+      },
+      {
+        description:
+          'An optional arg newOptionalArg2 on Type1.field1 was added.',
+        type: 'OPTIONAL_ARG_ADDED',
+      },
     ]);
   });
 
@@ -532,7 +559,7 @@ describe('findBreakingChanges', () => {
       }
     `);
 
-    expect(findBreakingChanges(oldSchema, newSchema)).to.deep.equal([]);
+    expect(findSchemaChanges(oldSchema, newSchema)).to.deep.equal([]);
   });
 
   it('should consider args that move away from NonNull as non-breaking', () => {
@@ -548,7 +575,7 @@ describe('findBreakingChanges', () => {
       }
     `);
 
-    expect(findBreakingChanges(oldSchema, newSchema)).to.deep.equal([]);
+    expect(findSchemaChanges(oldSchema, newSchema)).to.deep.equal([]);
   });
 
   it('should detect interfaces removed from types', () => {
@@ -564,7 +591,7 @@ describe('findBreakingChanges', () => {
       type Type1
     `);
 
-    expect(findBreakingChanges(oldSchema, newSchema)).to.deep.equal([
+    expect(findSchemaChanges(oldSchema, newSchema)).to.deep.equal([
       {
         type: BreakingChangeType.INTERFACE_REMOVED_FROM_OBJECT,
         description: 'Type1 no longer implements interface Interface1.',
@@ -587,7 +614,7 @@ describe('findBreakingChanges', () => {
       type Type1 implements SecondInterface & FirstInterface
     `);
 
-    expect(findBreakingChanges(oldSchema, newSchema)).to.deep.equal([]);
+    expect(findSchemaChanges(oldSchema, newSchema)).to.deep.equal([]);
   });
 
   it('should detect all breaking changes', () => {
@@ -657,7 +684,7 @@ describe('findBreakingChanges', () => {
       }
     `);
 
-    expect(findBreakingChanges(oldSchema, newSchema)).to.deep.equal([
+    expect(findSchemaChanges(oldSchema, newSchema)).to.deep.equal([
       {
         type: BreakingChangeType.TYPE_REMOVED,
         description: 'Int was removed.',
@@ -730,7 +757,7 @@ describe('findBreakingChanges', () => {
       directive @DirectiveThatStays on FIELD_DEFINITION
     `);
 
-    expect(findBreakingChanges(oldSchema, newSchema)).to.deep.equal([
+    expect(findSchemaChanges(oldSchema, newSchema)).to.deep.equal([
       {
         type: BreakingChangeType.DIRECTIVE_REMOVED,
         description: 'DirectiveThatIsRemoved was removed.',
@@ -745,7 +772,7 @@ describe('findBreakingChanges', () => {
       directives: [GraphQLSkipDirective, GraphQLIncludeDirective],
     });
 
-    expect(findBreakingChanges(oldSchema, newSchema)).to.deep.equal([
+    expect(findSchemaChanges(oldSchema, newSchema)).to.deep.equal([
       {
         type: BreakingChangeType.DIRECTIVE_REMOVED,
         description: `${GraphQLDeprecatedDirective.name} was removed.`,
@@ -762,7 +789,7 @@ describe('findBreakingChanges', () => {
       directive @DirectiveWithArg on FIELD_DEFINITION
     `);
 
-    expect(findBreakingChanges(oldSchema, newSchema)).to.deep.equal([
+    expect(findSchemaChanges(oldSchema, newSchema)).to.deep.equal([
       {
         type: BreakingChangeType.DIRECTIVE_ARG_REMOVED,
         description: 'arg1 was removed from DirectiveWithArg.',
@@ -783,7 +810,7 @@ describe('findBreakingChanges', () => {
       ) on FIELD_DEFINITION
     `);
 
-    expect(findBreakingChanges(oldSchema, newSchema)).to.deep.equal([
+    expect(findSchemaChanges(oldSchema, newSchema)).to.deep.equal([
       {
         type: BreakingChangeType.REQUIRED_DIRECTIVE_ARG_ADDED,
         description:
@@ -801,7 +828,7 @@ describe('findBreakingChanges', () => {
       directive @DirectiveName on FIELD_DEFINITION
     `);
 
-    expect(findBreakingChanges(oldSchema, newSchema)).to.deep.equal([
+    expect(findSchemaChanges(oldSchema, newSchema)).to.deep.equal([
       {
         type: BreakingChangeType.DIRECTIVE_LOCATION_REMOVED,
         description: 'QUERY was removed from DirectiveName.',
@@ -810,7 +837,7 @@ describe('findBreakingChanges', () => {
   });
 });
 
-describe('findDangerousChanges', () => {
+describe('findSchemaChanges', () => {
   it('should detect if a defaultValue changed on an argument', () => {
     const oldSDL = `
       input Input1 {
@@ -836,7 +863,7 @@ describe('findDangerousChanges', () => {
 
     const oldSchema = buildSchema(oldSDL);
     const copyOfOldSchema = buildSchema(oldSDL);
-    expect(findDangerousChanges(oldSchema, copyOfOldSchema)).to.deep.equal([]);
+    expect(findSchemaChanges(oldSchema, copyOfOldSchema)).to.deep.equal([]);
 
     const newSchema = buildSchema(`
       input Input1 {
@@ -860,7 +887,7 @@ describe('findDangerousChanges', () => {
       }
     `);
 
-    expect(findDangerousChanges(oldSchema, newSchema)).to.deep.equal([
+    expect(findSchemaChanges(oldSchema, newSchema)).to.deep.equal([
       {
         type: DangerousChangeType.ARG_DEFAULT_VALUE_CHANGE,
         description:
@@ -918,7 +945,7 @@ describe('findDangerousChanges', () => {
       }
     `);
 
-    expect(findDangerousChanges(oldSchema, newSchema)).to.deep.equal([]);
+    expect(findSchemaChanges(oldSchema, newSchema)).to.deep.equal([]);
   });
 
   it('should ignore changes in field definitions order', () => {
@@ -950,7 +977,7 @@ describe('findDangerousChanges', () => {
       }
     `);
 
-    expect(findDangerousChanges(oldSchema, newSchema)).to.deep.equal([]);
+    expect(findSchemaChanges(oldSchema, newSchema)).to.deep.equal([]);
   });
 
   it('should detect if a value was added to an enum type', () => {
@@ -969,7 +996,7 @@ describe('findDangerousChanges', () => {
       }
     `);
 
-    expect(findDangerousChanges(oldSchema, newSchema)).to.deep.equal([
+    expect(findSchemaChanges(oldSchema, newSchema)).to.deep.equal([
       {
         type: DangerousChangeType.VALUE_ADDED_TO_ENUM,
         description: 'VALUE2 was added to enum type EnumType1.',
@@ -992,7 +1019,7 @@ describe('findDangerousChanges', () => {
       type Type1 implements OldInterface & NewInterface
     `);
 
-    expect(findDangerousChanges(oldSchema, newSchema)).to.deep.equal([
+    expect(findSchemaChanges(oldSchema, newSchema)).to.deep.equal([
       {
         type: DangerousChangeType.INTERFACE_ADDED_TO_OBJECT,
         description: 'NewInterface added to interfaces implemented by Type1.',
@@ -1015,7 +1042,7 @@ describe('findDangerousChanges', () => {
       union UnionType1 = Type1 | Type2
     `);
 
-    expect(findDangerousChanges(oldSchema, newSchema)).to.deep.equal([
+    expect(findSchemaChanges(oldSchema, newSchema)).to.deep.equal([
       {
         type: DangerousChangeType.TYPE_ADDED_TO_UNION,
         description: 'Type2 was added to union type UnionType1.',
@@ -1037,7 +1064,7 @@ describe('findDangerousChanges', () => {
       }
     `);
 
-    expect(findDangerousChanges(oldSchema, newSchema)).to.deep.equal([
+    expect(findSchemaChanges(oldSchema, newSchema)).to.deep.equal([
       {
         type: DangerousChangeType.OPTIONAL_INPUT_FIELD_ADDED,
         description:
@@ -1083,7 +1110,7 @@ describe('findDangerousChanges', () => {
       union UnionTypeThatGainsAType = TypeInUnion1 | TypeInUnion2
     `);
 
-    expect(findDangerousChanges(oldSchema, newSchema)).to.deep.equal([
+    expect(findSchemaChanges(oldSchema, newSchema)).to.deep.equal([
       {
         type: DangerousChangeType.VALUE_ADDED_TO_ENUM,
         description: 'VALUE2 was added to enum type EnumType1.',
@@ -1119,7 +1146,7 @@ describe('findDangerousChanges', () => {
       }
     `);
 
-    expect(findDangerousChanges(oldSchema, newSchema)).to.deep.equal([
+    expect(findSchemaChanges(oldSchema, newSchema)).to.deep.equal([
       {
         type: DangerousChangeType.OPTIONAL_ARG_ADDED,
         description: 'An optional arg arg2 on Type1.field1 was added.',
diff --git a/src/utilities/findBreakingChanges.js b/src/utilities/findBreakingChanges.js
index d53b107dd7..6885905c88 100644
--- a/src/utilities/findBreakingChanges.js
+++ b/src/utilities/findBreakingChanges.js
@@ -62,50 +62,20 @@ export const DangerousChangeType = Object.freeze({
   ARG_DEFAULT_VALUE_CHANGE: 'ARG_DEFAULT_VALUE_CHANGE',
 });
 
-export type BreakingChange = {
-  type: $Keys<typeof BreakingChangeType>,
-  description: string,
-  ...
-};
-
-export type DangerousChange = {
-  type: $Keys<typeof DangerousChangeType>,
+export type SchemaChange = {
+  type: $Keys<typeof BreakingChangeType> | $Keys<typeof DangerousChangeType>,
   description: string,
   ...
 };
 
 /**
  * Given two schemas, returns an Array containing descriptions of all the types
- * of breaking changes covered by the other functions down below.
+ * of potentially breaking and dangerous changes.
  */
-export function findBreakingChanges(
-  oldSchema: GraphQLSchema,
-  newSchema: GraphQLSchema,
-): Array<BreakingChange> {
-  const breakingChanges = findSchemaChanges(oldSchema, newSchema).filter(
-    change => change.type in BreakingChangeType,
-  );
-  return ((breakingChanges: any): Array<BreakingChange>);
-}
-
-/**
- * Given two schemas, returns an Array containing descriptions of all the types
- * of potentially dangerous changes covered by the other functions down below.
- */
-export function findDangerousChanges(
-  oldSchema: GraphQLSchema,
-  newSchema: GraphQLSchema,
-): Array<DangerousChange> {
-  const dangerousChanges = findSchemaChanges(oldSchema, newSchema).filter(
-    change => change.type in DangerousChangeType,
-  );
-  return ((dangerousChanges: any): Array<DangerousChange>);
-}
-
-function findSchemaChanges(
+export function findSchemaChanges(
   oldSchema: GraphQLSchema,
   newSchema: GraphQLSchema,
-): Array<BreakingChange | DangerousChange> {
+): Array<SchemaChange> {
   return [
     ...findTypeChanges(oldSchema, newSchema),
     ...findDirectiveChanges(oldSchema, newSchema),
@@ -115,7 +85,7 @@ function findSchemaChanges(
 function findDirectiveChanges(
   oldSchema: GraphQLSchema,
   newSchema: GraphQLSchema,
-): Array<BreakingChange | DangerousChange> {
+): Array<SchemaChange> {
   const schemaChanges = [];
 
   const directivesDiff = diff(
@@ -165,7 +135,7 @@ function findDirectiveChanges(
 function findTypeChanges(
   oldSchema: GraphQLSchema,
   newSchema: GraphQLSchema,
-): Array<BreakingChange | DangerousChange> {
+): Array<SchemaChange> {
   const schemaChanges = [];
 
   const typesDiff = diff(
@@ -207,7 +177,7 @@ function findTypeChanges(
 function findInputObjectTypeChanges(
   oldType: GraphQLInputObjectType,
   newType: GraphQLInputObjectType,
-): Array<BreakingChange | DangerousChange> {
+): Array<SchemaChange> {
   const schemaChanges = [];
   const fieldsDiff = diff(
     objectValues(oldType.getFields()),
@@ -256,7 +226,7 @@ function findInputObjectTypeChanges(
 function findUnionTypeChanges(
   oldType: GraphQLUnionType,
   newType: GraphQLUnionType,
-): Array<BreakingChange | DangerousChange> {
+): Array<SchemaChange> {
   const schemaChanges = [];
   const possibleTypesDiff = diff(oldType.getTypes(), newType.getTypes());
 
@@ -280,7 +250,7 @@ function findUnionTypeChanges(
 function findEnumTypeChanges(
   oldType: GraphQLEnumType,
   newType: GraphQLEnumType,
-): Array<BreakingChange | DangerousChange> {
+): Array<SchemaChange> {
   const schemaChanges = [];
   const valuesDiff = diff(oldType.getValues(), newType.getValues());
 
@@ -304,7 +274,7 @@ function findEnumTypeChanges(
 function findObjectTypeChanges(
   oldType: GraphQLObjectType,
   newType: GraphQLObjectType,
-): Array<BreakingChange | DangerousChange> {
+): Array<SchemaChange> {
   const schemaChanges = findFieldChanges(oldType, newType);
   const interfacesDiff = diff(oldType.getInterfaces(), newType.getInterfaces());
 
@@ -328,7 +298,7 @@ function findObjectTypeChanges(
 function findFieldChanges(
   oldType: GraphQLObjectType | GraphQLInterfaceType,
   newType: GraphQLObjectType | GraphQLInterfaceType,
-): Array<BreakingChange | DangerousChange> {
+): Array<SchemaChange> {
   const schemaChanges = [];
   const fieldsDiff = diff(
     objectValues(oldType.getFields()),
@@ -366,7 +336,7 @@ function findArgChanges(
   oldType: GraphQLObjectType | GraphQLInterfaceType,
   oldField: GraphQLField<mixed, mixed>,
   newField: GraphQLField<mixed, mixed>,
-): Array<BreakingChange | DangerousChange> {
+): Array<SchemaChange> {
   const schemaChanges = [];
   const argsDiff = diff(oldField.args, newField.args);
 
diff --git a/src/utilities/index.js b/src/utilities/index.js
index 02bc9382bc..7f8ae863a7 100644
--- a/src/utilities/index.js
+++ b/src/utilities/index.js
@@ -107,10 +107,9 @@ export { assertValidName, isValidNameError } from './assertValidName';
 export {
   BreakingChangeType,
   DangerousChangeType,
-  findBreakingChanges,
-  findDangerousChanges,
+  findSchemaChanges,
 } from './findBreakingChanges';
-export type { BreakingChange, DangerousChange } from './findBreakingChanges';
+export type { SchemaChange } from './findBreakingChanges';
 
 // Report all deprecated usage within a GraphQL document.
 export { findDeprecatedUsages } from './findDeprecatedUsages';
diff --git a/tstypes/index.d.ts b/tstypes/index.d.ts
index b5c614bcda..fca0440caa 100644
--- a/tstypes/index.d.ts
+++ b/tstypes/index.d.ts
@@ -403,8 +403,7 @@ export {
   // Compares two GraphQLSchemas and detects breaking changes.
   BreakingChangeType,
   DangerousChangeType,
-  findBreakingChanges,
-  findDangerousChanges,
+  findSchemaChanges,
   // Report all deprecated usage within a GraphQL document.
   findDeprecatedUsages,
 } from './utilities';
@@ -433,6 +432,5 @@ export {
   IntrospectionEnumValue,
   IntrospectionDirective,
   BuildSchemaOptions,
-  BreakingChange,
-  DangerousChange,
+  SchemaChange,
 } from './utilities';
diff --git a/tstypes/utilities/findBreakingChanges.d.ts b/tstypes/utilities/findBreakingChanges.d.ts
index 87fa0c028e..0eb2a12ece 100644
--- a/tstypes/utilities/findBreakingChanges.d.ts
+++ b/tstypes/utilities/findBreakingChanges.d.ts
@@ -35,30 +35,16 @@ type _DangerousChangeType = {
   ARG_DEFAULT_VALUE_CHANGE: 'ARG_DEFAULT_VALUE_CHANGE';
 };
 
-export interface BreakingChange {
-  type: keyof _BreakingChangeType;
+export interface SchemaChange {
+  type: keyof _BreakingChangeType | keyof _DangerousChangeType;
   description: string;
 }
 
-export interface DangerousChange {
-  type: keyof _DangerousChangeType;
-  description: string;
-}
-
-/**
- * Given two schemas, returns an Array containing descriptions of all the types
- * of breaking changes covered by the other functions down below.
- */
-export function findBreakingChanges(
-  oldSchema: GraphQLSchema,
-  newSchema: GraphQLSchema,
-): Array<BreakingChange>;
-
 /**
  * Given two schemas, returns an Array containing descriptions of all the types
- * of potentially dangerous changes covered by the other functions down below.
+ * of breaking and dangerous changes covered by the other functions down below.
  */
-export function findDangerousChanges(
+export function findSchemaChanges(
   oldSchema: GraphQLSchema,
   newSchema: GraphQLSchema,
-): Array<DangerousChange>;
+): Array<SchemaChange>;
diff --git a/tstypes/utilities/index.d.ts b/tstypes/utilities/index.d.ts
index 8480b8541a..f924402770 100644
--- a/tstypes/utilities/index.d.ts
+++ b/tstypes/utilities/index.d.ts
@@ -104,10 +104,8 @@ export { assertValidName, isValidNameError } from './assertValidName';
 export {
   BreakingChangeType,
   DangerousChangeType,
-  findBreakingChanges,
-  findDangerousChanges,
-  BreakingChange,
-  DangerousChange,
+  SchemaChange,
+  findSchemaChanges,
 } from './findBreakingChanges';
 
 // Report all deprecated usage within a GraphQL document.