diff --git a/src/plugins/data/common/index_patterns/index_patterns/index_patterns.ts b/src/plugins/data/common/index_patterns/index_patterns/index_patterns.ts
index 2c4999429b321..b24d2d6cfde3a 100644
--- a/src/plugins/data/common/index_patterns/index_patterns/index_patterns.ts
+++ b/src/plugins/data/common/index_patterns/index_patterns/index_patterns.ts
@@ -47,7 +47,6 @@ import { IndexPatternMissingIndices } from '../lib';
 import { findByTitle } from '../utils';
 import { DuplicateIndexPatternError } from '../errors';
 
-const indexPatternCache = createIndexPatternCache();
 const MAX_ATTEMPTS_TO_RESOLVE_CONFLICTS = 3;
 const savedObjectType = 'index-pattern';
 
@@ -75,6 +74,7 @@ export class IndexPatternsService {
   private onNotification: OnNotification;
   private onError: OnError;
   private onUnsupportedTimePattern: OnUnsupportedTimePattern;
+  private indexPatternCache: ReturnType<typeof createIndexPatternCache>;
   ensureDefaultIndexPattern: EnsureDefaultIndexPattern;
 
   constructor({
@@ -98,6 +98,8 @@ export class IndexPatternsService {
       uiSettings,
       onRedirectNoIndexPattern
     );
+
+    this.indexPatternCache = createIndexPatternCache();
   }
 
   /**
@@ -180,9 +182,9 @@ export class IndexPatternsService {
   clearCache = (id?: string) => {
     this.savedObjectsCache = null;
     if (id) {
-      indexPatternCache.clear(id);
+      this.indexPatternCache.clear(id);
     } else {
-      indexPatternCache.clearAll();
+      this.indexPatternCache.clearAll();
     }
   };
 
@@ -468,11 +470,12 @@ export class IndexPatternsService {
 
   get = async (id: string): Promise<IndexPattern> => {
     const indexPatternPromise =
-      indexPatternCache.get(id) || indexPatternCache.set(id, this.getSavedObjectAndInit(id));
+      this.indexPatternCache.get(id) ||
+      this.indexPatternCache.set(id, this.getSavedObjectAndInit(id));
 
     // don't cache failed requests
     indexPatternPromise.catch(() => {
-      indexPatternCache.clear(id);
+      this.indexPatternCache.clear(id);
     });
 
     return indexPatternPromise;
@@ -536,7 +539,7 @@ export class IndexPatternsService {
       id: indexPattern.id,
     });
     indexPattern.id = response.id;
-    indexPatternCache.set(indexPattern.id, Promise.resolve(indexPattern));
+    this.indexPatternCache.set(indexPattern.id, Promise.resolve(indexPattern));
     return indexPattern;
   }
 
@@ -619,7 +622,7 @@ export class IndexPatternsService {
           indexPattern.version = samePattern.version;
 
           // Clear cache
-          indexPatternCache.clear(indexPattern.id!);
+          this.indexPatternCache.clear(indexPattern.id!);
 
           // Try the save again
           return this.updateSavedObject(indexPattern, saveAttempts, ignoreErrors);
@@ -633,7 +636,7 @@ export class IndexPatternsService {
    * @param indexPatternId: Id of kibana Index Pattern to delete
    */
   async delete(indexPatternId: string) {
-    indexPatternCache.clear(indexPatternId);
+    this.indexPatternCache.clear(indexPatternId);
     return this.savedObjectsClient.delete('index-pattern', indexPatternId);
   }
 }
diff --git a/test/api_integration/apis/index_patterns/fields_api/update_fields/main.ts b/test/api_integration/apis/index_patterns/fields_api/update_fields/main.ts
index 861987c30705c..ac12e7ef04a1a 100644
--- a/test/api_integration/apis/index_patterns/fields_api/update_fields/main.ts
+++ b/test/api_integration/apis/index_patterns/fields_api/update_fields/main.ts
@@ -22,8 +22,32 @@ import { FtrProviderContext } from '../../../../ftr_provider_context';
 
 export default function ({ getService }: FtrProviderContext) {
   const supertest = getService('supertest');
+  const esArchiver = getService('esArchiver');
 
   describe('main', () => {
+    const basicIndex = 'ba*ic_index';
+    let indexPattern: any;
+
+    before(async () => {
+      await esArchiver.load('index_patterns/basic_index');
+
+      indexPattern = (
+        await supertest.post('/api/index_patterns/index_pattern').send({
+          index_pattern: {
+            title: basicIndex,
+          },
+        })
+      ).body.index_pattern;
+    });
+
+    after(async () => {
+      await esArchiver.unload('index_patterns/basic_index');
+
+      if (indexPattern) {
+        await supertest.delete('/api/index_patterns/index_pattern/' + indexPattern.id);
+      }
+    });
+
     it('can update multiple fields', async () => {
       const title = `foo-${Date.now()}-${Math.random()}*`;
       const response1 = await supertest.post('/api/index_patterns/index_pattern').send({
@@ -171,48 +195,6 @@ export default function ({ getService }: FtrProviderContext) {
         expect(response3.status).to.be(200);
         expect(response3.body.index_pattern.fieldAttrs.foo.count).to.be(undefined);
       });
-
-      it('can set field "count" attribute on an existing field', async () => {
-        const title = `foo-${Date.now()}-${Math.random()}*`;
-        const response1 = await supertest.post('/api/index_patterns/index_pattern').send({
-          index_pattern: {
-            title,
-            fields: {
-              foo: {
-                name: 'foo',
-                type: 'string',
-                count: 123,
-              },
-            },
-          },
-        });
-
-        expect(response1.status).to.be(200);
-        expect(response1.body.index_pattern.fieldAttrs.foo).to.be(undefined);
-        expect(response1.body.index_pattern.fields.foo.count).to.be(123);
-
-        const response2 = await supertest
-          .post(`/api/index_patterns/index_pattern/${response1.body.index_pattern.id}/fields`)
-          .send({
-            fields: {
-              foo: {
-                count: 456,
-              },
-            },
-          });
-
-        expect(response2.status).to.be(200);
-        expect(response2.body.index_pattern.fieldAttrs.foo).to.be(undefined);
-        expect(response2.body.index_pattern.fields.foo.count).to.be(456);
-
-        const response3 = await supertest.get(
-          `/api/index_patterns/index_pattern/${response1.body.index_pattern.id}`
-        );
-
-        expect(response3.status).to.be(200);
-        expect(response3.body.index_pattern.fieldAttrs.foo).to.be(undefined);
-        expect(response3.body.index_pattern.fields.foo.count).to.be(456);
-      });
     });
 
     describe('customLabel', () => {
@@ -323,46 +305,20 @@ export default function ({ getService }: FtrProviderContext) {
       });
 
       it('can set field "customLabel" attribute on an existing field', async () => {
-        const title = `foo-${Date.now()}-${Math.random()}*`;
-        const response1 = await supertest.post('/api/index_patterns/index_pattern').send({
-          index_pattern: {
-            title,
-            fields: {
-              foo: {
-                name: 'foo',
-                type: 'string',
-                count: 123,
-                customLabel: 'foo',
-              },
+        await supertest.post(`/api/index_patterns/index_pattern/${indexPattern.id}/fields`).send({
+          fields: {
+            foo: {
+              customLabel: 'baz',
             },
           },
         });
 
-        expect(response1.status).to.be(200);
-        expect(response1.body.index_pattern.fieldAttrs.foo).to.be(undefined);
-        expect(response1.body.index_pattern.fields.foo.customLabel).to.be('foo');
-
-        const response2 = await supertest
-          .post(`/api/index_patterns/index_pattern/${response1.body.index_pattern.id}/fields`)
-          .send({
-            fields: {
-              foo: {
-                customLabel: 'baz',
-              },
-            },
-          });
-
-        expect(response2.status).to.be(200);
-        expect(response2.body.index_pattern.fieldAttrs.foo).to.be(undefined);
-        expect(response2.body.index_pattern.fields.foo.customLabel).to.be('baz');
-
-        const response3 = await supertest.get(
-          `/api/index_patterns/index_pattern/${response1.body.index_pattern.id}`
+        const response1 = await supertest.get(
+          `/api/index_patterns/index_pattern/${indexPattern.id}`
         );
 
-        expect(response3.status).to.be(200);
-        expect(response3.body.index_pattern.fieldAttrs.foo).to.be(undefined);
-        expect(response3.body.index_pattern.fields.foo.customLabel).to.be('baz');
+        expect(response1.status).to.be(200);
+        expect(response1.body.index_pattern.fields.foo.customLabel).to.be('baz');
       });
     });
 
@@ -463,31 +419,8 @@ export default function ({ getService }: FtrProviderContext) {
       });
 
       it('can remove "format" attribute from index_pattern format map', async () => {
-        const title = `foo-${Date.now()}-${Math.random()}*`;
-        const response1 = await supertest.post('/api/index_patterns/index_pattern').send({
-          index_pattern: {
-            title,
-            fieldFormats: {
-              foo: {
-                id: 'bar',
-                params: {
-                  baz: 'qux',
-                },
-              },
-            },
-          },
-        });
-
-        expect(response1.status).to.be(200);
-        expect(response1.body.index_pattern.fieldFormats.foo).to.eql({
-          id: 'bar',
-          params: {
-            baz: 'qux',
-          },
-        });
-
         const response2 = await supertest
-          .post(`/api/index_patterns/index_pattern/${response1.body.index_pattern.id}/fields`)
+          .post(`/api/index_patterns/index_pattern/${indexPattern.id}/fields`)
           .send({
             fields: {
               foo: {
@@ -500,7 +433,7 @@ export default function ({ getService }: FtrProviderContext) {
         expect(response2.body.index_pattern.fieldFormats.foo).to.be(undefined);
 
         const response3 = await supertest.get(
-          `/api/index_patterns/index_pattern/${response1.body.index_pattern.id}`
+          `/api/index_patterns/index_pattern/${indexPattern.id}`
         );
 
         expect(response3.status).to.be(200);
diff --git a/test/api_integration/apis/index_patterns/index_pattern_crud/update_index_pattern/main.ts b/test/api_integration/apis/index_patterns/index_pattern_crud/update_index_pattern/main.ts
index bfc4c23738aef..9c6cb54d16f44 100644
--- a/test/api_integration/apis/index_patterns/index_pattern_crud/update_index_pattern/main.ts
+++ b/test/api_integration/apis/index_patterns/index_pattern_crud/update_index_pattern/main.ts
@@ -262,44 +262,6 @@ export default function ({ getService }: FtrProviderContext) {
       expect(response3.body.index_pattern.typeMeta).to.eql({ foo: 'baz' });
     });
 
-    it('can update index_pattern fields', async () => {
-      const title = `foo-${Date.now()}-${Math.random()}*`;
-      const response1 = await supertest.post('/api/index_patterns/index_pattern').send({
-        index_pattern: {
-          title,
-          fields: {
-            foo: {
-              name: 'foo',
-              type: 'string',
-            },
-          },
-        },
-      });
-
-      expect(response1.body.index_pattern.fields.foo.name).to.be('foo');
-      expect(response1.body.index_pattern.fields.foo.type).to.be('string');
-
-      const id = response1.body.index_pattern.id;
-      const response2 = await supertest.post('/api/index_patterns/index_pattern/' + id).send({
-        index_pattern: {
-          fields: {
-            bar: {
-              name: 'bar',
-              type: 'number',
-            },
-          },
-        },
-      });
-
-      expect(response2.body.index_pattern.fields.bar.name).to.be('bar');
-      expect(response2.body.index_pattern.fields.bar.type).to.be('number');
-
-      const response3 = await supertest.get('/api/index_patterns/index_pattern/' + id);
-
-      expect(response3.body.index_pattern.fields.bar.name).to.be('bar');
-      expect(response3.body.index_pattern.fields.bar.type).to.be('number');
-    });
-
     it('can update multiple index pattern fields at once', async () => {
       const title = `foo-${Date.now()}-${Math.random()}*`;
       const response1 = await supertest.post('/api/index_patterns/index_pattern').send({
diff --git a/test/api_integration/apis/index_patterns/scripted_fields_crud/delete_scripted_field/errors.ts b/test/api_integration/apis/index_patterns/scripted_fields_crud/delete_scripted_field/errors.ts
index 2182f47d91c08..7e26541680a39 100644
--- a/test/api_integration/apis/index_patterns/scripted_fields_crud/delete_scripted_field/errors.ts
+++ b/test/api_integration/apis/index_patterns/scripted_fields_crud/delete_scripted_field/errors.ts
@@ -21,9 +21,33 @@ import expect from '@kbn/expect';
 import { FtrProviderContext } from '../../../../ftr_provider_context';
 
 export default function ({ getService }: FtrProviderContext) {
+  const esArchiver = getService('esArchiver');
   const supertest = getService('supertest');
 
   describe('errors', () => {
+    const basicIndex = 'b*sic_index';
+    let indexPattern: any;
+
+    before(async () => {
+      await esArchiver.load('index_patterns/basic_index');
+
+      indexPattern = (
+        await supertest.post('/api/index_patterns/index_pattern').send({
+          index_pattern: {
+            title: basicIndex,
+          },
+        })
+      ).body.index_pattern;
+    });
+
+    after(async () => {
+      await esArchiver.unload('index_patterns/basic_index');
+
+      if (indexPattern) {
+        await supertest.delete('/api/index_patterns/index_pattern/' + indexPattern.id);
+      }
+    });
+
     it('returns 404 error on non-existing index_pattern', async () => {
       const id = `xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx-${Date.now()}`;
       const response = await supertest.delete(
@@ -34,35 +58,16 @@ export default function ({ getService }: FtrProviderContext) {
     });
 
     it('returns 404 error on non-existing scripted field', async () => {
-      const title = `foo-${Date.now()}-${Math.random()}*`;
-      const response1 = await supertest.post('/api/index_patterns/index_pattern').send({
-        index_pattern: {
-          title,
-        },
-      });
-      const response2 = await supertest.delete(
-        `/api/index_patterns/index_pattern/${response1.body.index_pattern.id}/scripted_field/foo`
+      const response1 = await supertest.delete(
+        `/api/index_patterns/index_pattern/${indexPattern.id}/scripted_field/test`
       );
 
-      expect(response2.status).to.be(404);
+      expect(response1.status).to.be(404);
     });
 
     it('returns error when attempting to delete a field which is not a scripted field', async () => {
-      const title = `foo-${Date.now()}-${Math.random()}*`;
-      const response1 = await supertest.post('/api/index_patterns/index_pattern').send({
-        index_pattern: {
-          title,
-          fields: {
-            foo: {
-              scripted: false,
-              name: 'foo',
-              type: 'string',
-            },
-          },
-        },
-      });
       const response2 = await supertest.delete(
-        `/api/index_patterns/index_pattern/${response1.body.index_pattern.id}/scripted_field/foo`
+        `/api/index_patterns/index_pattern/${indexPattern.id}/scripted_field/foo`
       );
 
       expect(response2.status).to.be(400);
diff --git a/test/api_integration/apis/index_patterns/scripted_fields_crud/get_scripted_field/errors.ts b/test/api_integration/apis/index_patterns/scripted_fields_crud/get_scripted_field/errors.ts
index 1f39de8c03a96..71c28507b209d 100644
--- a/test/api_integration/apis/index_patterns/scripted_fields_crud/get_scripted_field/errors.ts
+++ b/test/api_integration/apis/index_patterns/scripted_fields_crud/get_scripted_field/errors.ts
@@ -21,9 +21,33 @@ import expect from '@kbn/expect';
 import { FtrProviderContext } from '../../../../ftr_provider_context';
 
 export default function ({ getService }: FtrProviderContext) {
+  const esArchiver = getService('esArchiver');
   const supertest = getService('supertest');
 
   describe('errors', () => {
+    const basicIndex = '*asic_index';
+    let indexPattern: any;
+
+    before(async () => {
+      await esArchiver.load('index_patterns/basic_index');
+
+      indexPattern = (
+        await supertest.post('/api/index_patterns/index_pattern').send({
+          index_pattern: {
+            title: basicIndex,
+          },
+        })
+      ).body.index_pattern;
+    });
+
+    after(async () => {
+      await esArchiver.unload('index_patterns/basic_index');
+
+      if (indexPattern) {
+        await supertest.delete('/api/index_patterns/index_pattern/' + indexPattern.id);
+      }
+    });
+
     it('returns 404 error on non-existing index_pattern', async () => {
       const id = `xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx-${Date.now()}`;
       const response = await supertest.get(
@@ -34,40 +58,11 @@ export default function ({ getService }: FtrProviderContext) {
     });
 
     it('returns 404 error on non-existing scripted field', async () => {
-      const title = `foo-${Date.now()}-${Math.random()}*`;
-      const response1 = await supertest.post('/api/index_patterns/index_pattern').send({
-        index_pattern: {
-          title,
-        },
-      });
-      const response2 = await supertest.get(
-        `/api/index_patterns/index_pattern/${response1.body.index_pattern.id}/scripted_field/foo`
-      );
-
-      expect(response2.status).to.be(404);
-    });
-
-    it('returns error when attempting to fetch a field which is not a scripted field', async () => {
-      const title = `foo-${Date.now()}-${Math.random()}*`;
-      const response1 = await supertest.post('/api/index_patterns/index_pattern').send({
-        index_pattern: {
-          title,
-          fields: {
-            foo: {
-              scripted: false,
-              name: 'foo',
-              type: 'string',
-            },
-          },
-        },
-      });
-      const response2 = await supertest.get(
-        `/api/index_patterns/index_pattern/${response1.body.index_pattern.id}/scripted_field/foo`
+      const response1 = await supertest.get(
+        `/api/index_patterns/index_pattern/${indexPattern.id}/scripted_field/sf`
       );
 
-      expect(response2.status).to.be(400);
-      expect(response2.body.statusCode).to.be(400);
-      expect(response2.body.message).to.be('Only scripted fields can be retrieved.');
+      expect(response1.status).to.be(404);
     });
 
     it('returns error when ID is too long', async () => {
@@ -81,5 +76,22 @@ export default function ({ getService }: FtrProviderContext) {
         '[request params.id]: value has length [1759] but it must have a maximum length of [1000].'
       );
     });
+
+    it('returns 404 error on non-existing scripted field', async () => {
+      const response1 = await supertest.get(
+        `/api/index_patterns/index_pattern/${indexPattern.id}/scripted_field/test`
+      );
+      expect(response1.status).to.be(404);
+    });
+
+    it('returns error when attempting to fetch a field which is not a scripted field', async () => {
+      const response2 = await supertest.get(
+        `/api/index_patterns/index_pattern/${indexPattern.id}/scripted_field/foo`
+      );
+
+      expect(response2.status).to.be(400);
+      expect(response2.body.statusCode).to.be(400);
+      expect(response2.body.message).to.be('Only scripted fields can be retrieved.');
+    });
   });
 }