diff --git a/packages/snaps-controllers/src/snaps/SnapController.test.tsx b/packages/snaps-controllers/src/snaps/SnapController.test.tsx
index e75b5cf2f0..174f263ff6 100644
--- a/packages/snaps-controllers/src/snaps/SnapController.test.tsx
+++ b/packages/snaps-controllers/src/snaps/SnapController.test.tsx
@@ -634,11 +634,9 @@ describe('SnapController', () => {
       }),
     );
 
-    await snapController.updateSnap(
-      MOCK_ORIGIN,
-      MOCK_SNAP_ID,
-      detectSnapLocation(),
-    );
+    await snapController.installSnaps(MOCK_ORIGIN, {
+      [MOCK_SNAP_ID]: { version: '1.1.0' },
+    });
 
     expect(messenger.call).toHaveBeenNthCalledWith(
       4,
@@ -727,11 +725,9 @@ describe('SnapController', () => {
       }),
     );
 
-    await snapController.updateSnap(
-      MOCK_ORIGIN,
-      MOCK_SNAP_ID,
-      detectSnapLocation(),
-    );
+    await snapController.installSnaps(MOCK_ORIGIN, {
+      [MOCK_SNAP_ID]: { version: '1.1.0' },
+    });
 
     expect(messenger.call).toHaveBeenNthCalledWith(
       6,
@@ -808,11 +804,9 @@ describe('SnapController', () => {
       }),
     );
 
-    await snapController.updateSnap(
-      MOCK_ORIGIN,
-      MOCK_SNAP_ID,
-      detectSnapLocation(),
-    );
+    await snapController.installSnaps(MOCK_ORIGIN, {
+      [MOCK_SNAP_ID]: { version: '1.1.0' },
+    });
 
     expect(messenger.call).toHaveBeenNthCalledWith(
       6,
@@ -1275,8 +1269,6 @@ describe('SnapController', () => {
       }),
     );
 
-    const authorizeSpy = jest.spyOn(controller as any, 'authorize');
-
     await controller.installSnaps(MOCK_ORIGIN, {
       [MOCK_SNAP_ID]: { version: '>0.9.0 <1.1.0' },
     });
@@ -1284,7 +1276,6 @@ describe('SnapController', () => {
     const newSnap = controller.get(MOCK_SNAP_ID);
 
     expect(newSnap).toStrictEqual(getSnapObject());
-    expect(authorizeSpy).not.toHaveBeenCalled();
     expect(messenger.call).not.toHaveBeenCalled();
 
     controller.destroy();
@@ -1360,7 +1351,8 @@ describe('SnapController', () => {
   });
 
   it('removes a snap that errors during installation after being added', async () => {
-    const messenger = getSnapControllerMessenger();
+    const rootMessenger = getControllerMessenger();
+    const messenger = getSnapControllerMessenger(rootMessenger);
     const snapController = getSnapController(
       getSnapControllerOptions({
         messenger,
@@ -1370,28 +1362,31 @@ describe('SnapController', () => {
 
     const messengerCallMock = jest.spyOn(messenger, 'call');
 
-    jest
-      .spyOn(snapController as any, 'authorize')
-      .mockImplementationOnce(() => {
-        throw new Error('foo');
-      });
+    rootMessenger.registerActionHandler(
+      'ApprovalController:updateRequestState',
+      (request) => {
+        approvalControllerMock.updateRequestStateAndReject.bind(
+          approvalControllerMock,
+        )(request);
+      },
+    );
 
     await expect(
       snapController.installSnaps(MOCK_ORIGIN, {
         [MOCK_SNAP_ID]: {},
       }),
-    ).rejects.toThrow('foo');
+    ).rejects.toThrow('User rejected the request.');
 
-    expect(messengerCallMock).toHaveBeenCalledTimes(9);
+    expect(messengerCallMock).toHaveBeenCalledTimes(10);
 
     expect(messengerCallMock).toHaveBeenNthCalledWith(
-      4,
+      5,
       'ApprovalController:updateRequestState',
       expect.objectContaining({
         id: expect.any(String),
         requestState: {
           loading: false,
-          error: 'foo',
+          error: 'User rejected the request.',
           type: SNAP_APPROVAL_INSTALL,
         },
       }),
@@ -5444,13 +5439,12 @@ describe('SnapController', () => {
         }),
       );
 
-      const authorizeSpy = jest.spyOn(snapController as any, 'authorize');
       const result = await snapController.installSnaps(MOCK_ORIGIN, {
         [MOCK_SNAP_ID]: {},
       });
       expect(result).toStrictEqual({ [MOCK_SNAP_ID]: truncatedSnap });
 
-      expect(authorizeSpy).not.toHaveBeenCalled();
+      expect(messenger.call).not.toHaveBeenCalled();
 
       snapController.destroy();
     });
@@ -6887,12 +6881,6 @@ describe('SnapController', () => {
         },
       ];
 
-      const snapControllerOptions = getSnapControllerWithEESOptions({
-        preinstalledSnaps,
-        rootMessenger,
-      });
-      const [snapController] = getSnapControllerWithEES(snapControllerOptions);
-
       // After install the snap should have permissions
       rootMessenger.registerActionHandler(
         'PermissionController:getPermissions',
@@ -6909,12 +6897,17 @@ describe('SnapController', () => {
         manifest: manifest.result,
       });
 
+      const snapControllerOptions = getSnapControllerWithEESOptions({
+        preinstalledSnaps,
+        rootMessenger,
+        detectSnapLocation,
+      });
+      const [snapController] = getSnapControllerWithEES(snapControllerOptions);
+
       await expect(
-        snapController.updateSnap(
-          MOCK_ORIGIN,
-          MOCK_SNAP_ID,
-          detectSnapLocation(),
-        ),
+        snapController.installSnaps(MOCK_ORIGIN, {
+          [MOCK_SNAP_ID]: { version: '1.1.0' },
+        }),
       ).rejects.toThrow('Preinstalled Snaps cannot be manually updated.');
 
       snapController.destroy();
@@ -7663,11 +7656,9 @@ describe('SnapController', () => {
         () => ({}),
       );
 
-      await snapController.updateSnap(
-        MOCK_ORIGIN,
-        MOCK_SNAP_ID,
-        detectSnapLocation(),
-      );
+      await snapController.installSnaps(MOCK_ORIGIN, {
+        [MOCK_SNAP_ID]: { version: '1.1.0' },
+      });
 
       expect(messenger.call).toHaveBeenNthCalledWith(
         7,
@@ -7740,11 +7731,9 @@ describe('SnapController', () => {
         }),
       );
 
-      await snapController.updateSnap(
-        MOCK_ORIGIN,
-        MOCK_SNAP_ID,
-        detectSnapLocation(),
-      );
+      await snapController.installSnaps(MOCK_ORIGIN, {
+        [MOCK_SNAP_ID]: { version: '1.1.0' },
+      });
 
       expect(messenger.call).toHaveBeenNthCalledWith(
         7,
@@ -8462,46 +8451,7 @@ describe('SnapController', () => {
     snapController.destroy();
   });
 
-  describe('updateSnap', () => {
-    it('throws an error for non installed snap', async () => {
-      const detectSnapLocation = loopbackDetect();
-      const controller = getSnapController();
-
-      await expect(async () =>
-        controller.updateSnap(
-          MOCK_ORIGIN,
-          MOCK_LOCAL_SNAP_ID,
-          detectSnapLocation(),
-        ),
-      ).rejects.toThrow(`Snap "${MOCK_LOCAL_SNAP_ID}" not found.`);
-
-      controller.destroy();
-    });
-
-    it('throws an error if the specified SemVer range is invalid', async () => {
-      const detectSnapLocation = loopbackDetect();
-      const controller = getSnapController(
-        getSnapControllerOptions({
-          state: {
-            snaps: getPersistedSnapsState(),
-          },
-        }),
-      );
-
-      await expect(
-        controller.updateSnap(
-          MOCK_ORIGIN,
-          MOCK_SNAP_ID,
-          detectSnapLocation(),
-          'this is not a version' as SemVerRange,
-        ),
-      ).rejects.toThrow(
-        'Received invalid snap version range: "this is not a version".',
-      );
-
-      controller.destroy();
-    });
-
+  describe('Updating Snaps', () => {
     it("throws an error if new version doesn't match version range", async () => {
       const { manifest } = await getMockSnapFilesWithUpdatedChecksum({
         manifest: getSnapManifest({
@@ -8530,13 +8480,9 @@ describe('SnapController', () => {
       const newSnap = controller.get(MOCK_SNAP_ID);
 
       await expect(
-        async () =>
-          await controller.updateSnap(
-            MOCK_ORIGIN,
-            MOCK_SNAP_ID,
-            detectSnapLocation(),
-            '1.2.0',
-          ),
+        controller.installSnaps(MOCK_ORIGIN, {
+          [MOCK_SNAP_ID]: { version: '1.2.0' },
+        }),
       ).rejects.toThrow(
         `Version mismatch. Manifest for "npm:@metamask/example-snap" specifies version "1.1.0" which doesn't satisfy requested version range "1.2.0".`,
       );
@@ -8573,7 +8519,9 @@ describe('SnapController', () => {
       });
 
       await expect(
-        controller.updateSnap(MOCK_ORIGIN, MOCK_SNAP_ID, detectSnapLocation()),
+        controller.installSnaps(MOCK_ORIGIN, {
+          [MOCK_SNAP_ID]: { version: '1.1.0' },
+        }),
       ).rejects.toThrow('Cannot install version "1.1.0" of snap');
 
       controller.destroy();
@@ -8608,15 +8556,13 @@ describe('SnapController', () => {
 
       const newSnap = controller.get(MOCK_SNAP_ID);
 
-      const errorMessage = `Snap "${MOCK_SNAP_ID}@${snap.version}" is already installed. Couldn't update to a version inside requested "*" range.`;
+      const errorMessage = `Snap "${MOCK_SNAP_ID}@${snap.version}" is already installed. Couldn't update to a version inside requested "0.9.0" range.`;
 
       await expect(
         async () =>
-          await controller.updateSnap(
-            MOCK_ORIGIN,
-            MOCK_SNAP_ID,
-            detectSnapLocation(),
-          ),
+          await controller.installSnaps(MOCK_ORIGIN, {
+            [MOCK_SNAP_ID]: { version: '0.9.0' },
+          }),
       ).rejects.toThrow(rpcErrors.invalidParams(errorMessage));
       expect(publishSpy).toHaveBeenCalledWith(
         'SnapController:snapInstallStarted',
@@ -8668,17 +8614,15 @@ describe('SnapController', () => {
 
       messenger.subscribe('SnapController:snapUpdated', onSnapUpdated);
 
-      const result = await controller.updateSnap(
-        MOCK_ORIGIN,
-        MOCK_SNAP_ID,
-        detectSnapLocation(),
-      );
+      const result = await controller.installSnaps(MOCK_ORIGIN, {
+        [MOCK_SNAP_ID]: { version: '1.1.0' },
+      });
 
       const newSnapTruncated = controller.getTruncated(MOCK_SNAP_ID);
 
       const newSnap = controller.get(MOCK_SNAP_ID);
 
-      expect(result).toStrictEqual(newSnapTruncated);
+      expect(result).toStrictEqual({ [MOCK_SNAP_ID]: newSnapTruncated });
       expect(newSnap?.version).toBe('1.1.0');
       expect(newSnap?.versionHistory).toStrictEqual([
         {
@@ -8769,7 +8713,7 @@ describe('SnapController', () => {
       );
 
       expect(messenger.call).toHaveBeenNthCalledWith(
-        21,
+        19,
         'ApprovalController:updateRequestState',
         expect.objectContaining({
           id: expect.any(String),
@@ -8819,17 +8763,15 @@ describe('SnapController', () => {
         }),
       );
 
-      const result = await controller.updateSnap(
-        MOCK_ORIGIN,
-        MOCK_SNAP_ID,
-        detectSnapLocation(),
-      );
+      const result = await controller.installSnaps(MOCK_ORIGIN, {
+        [MOCK_SNAP_ID]: { version: '1.1.0' },
+      });
 
       const newSnapTruncated = controller.getTruncated(MOCK_SNAP_ID);
 
       const newSnap = controller.get(MOCK_SNAP_ID);
 
-      expect(result).toStrictEqual(newSnapTruncated);
+      expect(result).toStrictEqual({ [MOCK_SNAP_ID]: newSnapTruncated });
       expect(newSnap?.version).toBe('1.1.0');
       expect(newSnap?.versionHistory).toStrictEqual([
         {
@@ -8873,11 +8815,9 @@ describe('SnapController', () => {
 
       const stopSnapSpy = jest.spyOn(controller as any, 'stopSnap');
 
-      await controller.updateSnap(
-        MOCK_ORIGIN,
-        MOCK_SNAP_ID,
-        detectSnapLocation(),
-      );
+      await controller.installSnaps(MOCK_ORIGIN, {
+        [MOCK_SNAP_ID]: { version: '1.1.0' },
+      });
 
       const isRunning = controller.isRunning(MOCK_SNAP_ID);
 
@@ -8964,7 +8904,7 @@ describe('SnapController', () => {
       );
 
       expect(callActionSpy).toHaveBeenNthCalledWith(
-        12,
+        10,
         'ApprovalController:updateRequestState',
         expect.objectContaining({
           id: expect.any(String),
@@ -9043,7 +8983,9 @@ describe('SnapController', () => {
       );
 
       await expect(
-        controller.updateSnap(MOCK_ORIGIN, MOCK_SNAP_ID, detectSnapLocation()),
+        controller.installSnaps(MOCK_ORIGIN, {
+          [MOCK_SNAP_ID]: { version: '1.1.0' },
+        }),
       ).rejects.toThrow('User rejected the request.');
 
       const newSnap = controller.get(MOCK_SNAP_ID);
@@ -9230,7 +9172,9 @@ describe('SnapController', () => {
       await controller.installSnaps(MOCK_ORIGIN, { [MOCK_SNAP_ID]: {} });
       await controller.stopSnap(MOCK_SNAP_ID);
 
-      await controller.updateSnap(MOCK_ORIGIN, MOCK_SNAP_ID, detect());
+      await controller.installSnaps(MOCK_ORIGIN, {
+        [MOCK_SNAP_ID]: { version: '1.1.0' },
+      });
 
       expect(callActionSpy).toHaveBeenCalledTimes(23);
 
@@ -9333,7 +9277,7 @@ describe('SnapController', () => {
       );
 
       expect(callActionSpy).toHaveBeenNthCalledWith(
-        23,
+        21,
         'ApprovalController:updateRequestState',
         expect.objectContaining({
           id: expect.any(String),
@@ -9595,7 +9539,9 @@ describe('SnapController', () => {
       );
 
       await snapController.installSnaps(MOCK_ORIGIN, { [MOCK_SNAP_ID]: {} });
-      await snapController.updateSnap(MOCK_ORIGIN, MOCK_SNAP_ID, detect());
+      await snapController.installSnaps(MOCK_ORIGIN, {
+        [MOCK_SNAP_ID]: { version: '1.1.0' },
+      });
 
       snapController.destroy();
     });
@@ -9622,11 +9568,9 @@ describe('SnapController', () => {
         }),
       );
 
-      await controller.updateSnap(
-        MOCK_ORIGIN,
-        MOCK_SNAP_ID,
-        detectSnapLocation(),
-      );
+      await controller.installSnaps(MOCK_ORIGIN, {
+        [MOCK_SNAP_ID]: { version: '1.2.0' },
+      });
 
       const newSnap = controller.get(MOCK_SNAP_ID);
       expect(newSnap?.version).toBe('1.2.0');
diff --git a/packages/snaps-controllers/src/snaps/SnapController.ts b/packages/snaps-controllers/src/snaps/SnapController.ts
index f490c70793..fe5951ef25 100644
--- a/packages/snaps-controllers/src/snaps/SnapController.ts
+++ b/packages/snaps-controllers/src/snaps/SnapController.ts
@@ -84,7 +84,6 @@ import {
   assertIsSnapManifest,
   assertIsValidSnapId,
   DEFAULT_ENDOWMENTS,
-  DEFAULT_REQUESTED_SNAP_VERSION,
   encodeAuxiliaryFile,
   HandlerType,
   isOriginAllowed,
@@ -131,7 +130,6 @@ import {
   hasProperty,
   inMilliseconds,
   isNonEmptyArray,
-  isValidSemVerRange,
   satisfiesVersionRange,
   timeSince,
   createDeferredPromise,
@@ -2650,7 +2648,7 @@ export class SnapController extends BaseController<
           pendingInstalls.push(snapId);
         }
 
-        result[snapId] = await this.processRequestedSnap(
+        result[snapId] = await this.#processRequestedSnap(
           origin,
           snapId,
           location,
@@ -2704,10 +2702,7 @@ export class SnapController extends BaseController<
    * @param versionRange - The semver range of the snap to install.
    * @returns The resulting snap object, or an error if something went wrong.
    */
-  // TODO: Either fix this lint violation or explain why it's necessary to
-  //  ignore.
-  // eslint-disable-next-line no-restricted-syntax
-  private async processRequestedSnap(
+  async #processRequestedSnap(
     origin: string,
     snapId: SnapId,
     location: SnapLocation,
@@ -2721,18 +2716,12 @@ export class SnapController extends BaseController<
         return existingSnap;
       }
 
-      return await this.updateSnap(
+      return await this.#updateSnap({
         origin,
         snapId,
         location,
         versionRange,
-        // Since we are requesting an update from within processRequestedSnap,
-        // we disable the emitting of the snapUpdated event and rely on the caller
-        // to publish this event after the update is complete.
-        // This is necessary as installSnaps may be installing multiple snaps
-        // and we don't want to emit events prematurely.
-        false,
-      );
+      });
     }
 
     this.#assertCanInstallSnaps();
@@ -2768,7 +2757,7 @@ export class SnapController extends BaseController<
         versionRange,
       });
 
-      await this.authorize(snapId, pendingApproval);
+      await this.#authorize(snapId, pendingApproval);
 
       pendingApproval = this.#createApproval({
         origin,
@@ -2867,20 +2856,24 @@ export class SnapController extends BaseController<
    * If the original version of the snap was blocked and the update succeeded,
    * the snap will be unblocked and enabled before it is restarted.
    *
-   * @param origin - The origin requesting the snap update.
-   * @param snapId - The id of the Snap to be updated.
-   * @param location - The location implementation of the snap.
-   * @param newVersionRange - A semver version range in which the maximum version will be chosen.
-   * @param emitEvent - An optional boolean flag to indicate whether this update should emit an event.
+   * @param options - An options bag.
+   * @param options.origin - The origin requesting the snap update.
+   * @param options.snapId - The id of the Snap to be updated.
+   * @param options.location - The location implementation of the snap.
+   * @param options.versionRange - A semver version range in which the maximum version will be chosen.
    * @returns The snap metadata if updated, `null` otherwise.
    */
-  async updateSnap(
-    origin: string,
-    snapId: SnapId,
-    location: SnapLocation,
-    newVersionRange: string = DEFAULT_REQUESTED_SNAP_VERSION,
-    emitEvent = true,
-  ): Promise<TruncatedSnap> {
+  async #updateSnap({
+    origin,
+    snapId,
+    location,
+    versionRange,
+  }: {
+    origin: string;
+    snapId: SnapId;
+    location: SnapLocation;
+    versionRange: SemVerRange;
+  }): Promise<TruncatedSnap> {
     this.#assertCanInstallSnaps();
     this.#assertCanUsePlatform();
 
@@ -2890,12 +2883,6 @@ export class SnapController extends BaseController<
       throw new Error('Preinstalled Snaps cannot be manually updated.');
     }
 
-    if (!isValidSemVerRange(newVersionRange)) {
-      throw new Error(
-        `Received invalid snap version range: "${newVersionRange}".`,
-      );
-    }
-
     let pendingApproval = this.#createApproval({
       origin,
       snapId,
@@ -2920,13 +2907,13 @@ export class SnapController extends BaseController<
       const newVersion = manifest.version;
       if (!gtVersion(newVersion, snap.version)) {
         throw rpcErrors.invalidParams(
-          `Snap "${snapId}@${snap.version}" is already installed. Couldn't update to a version inside requested "${newVersionRange}" range.`,
+          `Snap "${snapId}@${snap.version}" is already installed. Couldn't update to a version inside requested "${versionRange}" range.`,
         );
       }
 
-      if (!satisfiesVersionRange(newVersion, newVersionRange)) {
+      if (!satisfiesVersionRange(newVersion, versionRange)) {
         throw new Error(
-          `Version mismatch. Manifest for "${snapId}" specifies version "${newVersion}" which doesn't satisfy requested version range "${newVersionRange}".`,
+          `Version mismatch. Manifest for "${snapId}" specifies version "${newVersion}" which doesn't satisfy requested version range "${versionRange}".`,
         );
       }
 
@@ -3024,16 +3011,6 @@ export class SnapController extends BaseController<
 
       const truncatedSnap = this.getTruncatedExpect(snapId);
 
-      if (emitEvent) {
-        this.messagingSystem.publish(
-          'SnapController:snapUpdated',
-          truncatedSnap,
-          snap.version,
-          origin,
-          false,
-        );
-      }
-
       this.#updateApproval(pendingApproval.id, {
         loading: false,
         type: SNAP_APPROVAL_UPDATE,
@@ -3419,14 +3396,11 @@ export class SnapController extends BaseController<
    * Initiates a request for the given snap's initial permissions.
    * Must be called in order. See processRequestedSnap.
    *
-   * This function is not hash private yet because of tests.
-   *
    * @param snapId - The id of the Snap.
    * @param pendingApproval - Pending approval to update.
    * @returns The snap's approvedPermissions.
    */
-  // eslint-disable-next-line no-restricted-syntax
-  private async authorize(
+  async #authorize(
     snapId: SnapId,
     pendingApproval: PendingApproval,
   ): Promise<void> {