diff --git a/packages/core/src/__tests__/__fixtures__/gh-658/URIError.yaml b/packages/core/src/__tests__/__fixtures__/gh-658/URIError.yaml
index 4d545fa39..062e6d78b 100644
--- a/packages/core/src/__tests__/__fixtures__/gh-658/URIError.yaml
+++ b/packages/core/src/__tests__/__fixtures__/gh-658/URIError.yaml
@@ -28,6 +28,8 @@ paths:
             application/json:
               schema:
                 $ref: "#/components/schemas/Error"
+        "404":
+          $ref: './lib.yaml#/components/responses/NotFoundResponse'
         "500":
           description: No Bueno.
           content:
diff --git a/packages/core/src/__tests__/__fixtures__/gh-658/lib.yaml b/packages/core/src/__tests__/__fixtures__/gh-658/lib.yaml
index be265ae0c..64b75aebf 100644
--- a/packages/core/src/__tests__/__fixtures__/gh-658/lib.yaml
+++ b/packages/core/src/__tests__/__fixtures__/gh-658/lib.yaml
@@ -22,3 +22,26 @@ components:
           type: string
         test:
           $ref: ./URIError.yaml#/components/schemas/Foo
+    NotFound:
+      oneOf:
+        - $ref: '#/components/schemas/DoesntExist'
+        - $ref: '#/components/schemas/JustCantFindIt'
+    DoesntExist:
+      type: object
+      properties:
+        id:
+          type: string
+    JustCantFindIt:
+      type: object
+      properties:
+        name:
+          type: string
+
+  responses:
+    NotFoundResponse:
+      description: Not Found.
+      content:
+        application/json:
+          schema:
+            $ref: '#/components/schemas/NotFound'
+      
diff --git a/packages/core/src/__tests__/spectral.jest.test.ts b/packages/core/src/__tests__/spectral.jest.test.ts
index 38a8984a4..40ebc4d42 100644
--- a/packages/core/src/__tests__/spectral.jest.test.ts
+++ b/packages/core/src/__tests__/spectral.jest.test.ts
@@ -190,7 +190,7 @@ describe('Spectral', () => {
 
     const results = await s.run(new Document(fs.readFileSync(documentUri, 'utf8'), Parsers.Yaml, documentUri));
 
-    expect(results.length).toEqual(3);
+    expect(results.length).toEqual(5);
 
     return expect(results).toEqual([
       expect.objectContaining({
@@ -208,6 +208,36 @@ describe('Spectral', () => {
         },
       }),
 
+      expect.objectContaining({
+        path: ['components', 'schemas', 'DoesntExist', 'properties', 'id'],
+        source: expect.stringContaining('/src/__tests__/__fixtures__/gh-658/lib.yaml'),
+        range: {
+          end: {
+            character: 22,
+            line: 32,
+          },
+          start: {
+            character: 11,
+            line: 31,
+          },
+        },
+      }),
+
+      expect.objectContaining({
+        path: ['components', 'schemas', 'JustCantFindIt', 'properties', 'name'],
+        source: expect.stringContaining('/src/__tests__/__fixtures__/gh-658/lib.yaml'),
+        range: {
+          end: {
+            character: 22,
+            line: 37,
+          },
+          start: {
+            character: 13,
+            line: 36,
+          },
+        },
+      }),
+
       expect.objectContaining({
         path: ['paths', '/test', 'get', 'responses', '200', 'content', 'application/json', 'schema'],
         source: expect.stringContaining('/src/__tests__/__fixtures__/gh-658/URIError.yaml'),
@@ -229,11 +259,11 @@ describe('Spectral', () => {
         range: {
           end: {
             character: 18,
-            line: 43,
+            line: 45,
           },
           start: {
             character: 8,
-            line: 42,
+            line: 44,
           },
         },
       }),