diff --git a/src/utils/turbo_rates_oracle.test.ts b/src/utils/turbo_rates_oracle.test.ts
index 514eed4..d0251b2 100644
--- a/src/utils/turbo_rates_oracle.test.ts
+++ b/src/utils/turbo_rates_oracle.test.ts
@@ -1,32 +1,49 @@
 import chai, { expect } from 'chai';
+import sinon from 'sinon';
 import chaiAsPromised from 'chai-as-promised';
-import type { FiatID } from './fiat_oracle_types';
 import { TurboRatesOracle } from './turbo_rates_oracle';
 import { beforeEach, describe, it } from 'vitest';
+import {
+	TurboUnauthenticatedClient,
+	TurboRatesResponse
+} from '@ardrive/turbo-sdk';
 
-chai.use(chaiAsPromised);
+const turboStubbedResponse: TurboRatesResponse = {
+	winc: '10000',
+	fiat: {
+		aud: 10.123,
+		brl: 10.123,
+		cad: 10.123,
+		eur: 10.123,
+		gbp: 10.123,
+		hkd: 10.123,
+		inr: 10.123,
+		jpy: 10.123,
+		sgd: 10.123,
+		usd: 10.123
+	},
+	adjustments: []
+};
 
-const fiat: FiatID = 'usd';
-const examplePriceValue = 15.05;
+chai.use(chaiAsPromised);
 
-const TurboRatesResponseSample = `{
-	"winc": 1,
-	"fiat": {
-		"${fiat}": ${examplePriceValue}
-	}
-}`;
 describe('The TurboRatesOracle class', () => {
 	let turboRatesOracle: TurboRatesOracle;
+	let turboSpy: TurboUnauthenticatedClient;
 
 	beforeEach(() => {
-		turboRatesOracle = new TurboRatesOracle();
+		turboSpy = sinon.createStubInstance(TurboUnauthenticatedClient, {
+			getFiatRates: Promise.resolve(turboStubbedResponse)
+		});
+		turboRatesOracle = new TurboRatesOracle(turboSpy);
 	});
 
 	describe('getFiatRatesForToken function', () => {
-		it('returns the expected response after a single fetch', async () => {
-			expect(await turboRatesOracle.getTurboRates()).to.deep.equal(
-				TurboRatesResponseSample
-			);
+		it('returns the expected response from turbo', async () => {
+			const rates = await turboRatesOracle.getTurboRates();
+			expect(rates).to.deep.equal(turboStubbedResponse);
+			expect((turboSpy.getFiatRates as sinon.SinonStub).calledOnce).to.be
+				.true;
 		});
 	});
 });
diff --git a/src/utils/turbo_rates_oracle.ts b/src/utils/turbo_rates_oracle.ts
index edeeb01..94345dc 100644
--- a/src/utils/turbo_rates_oracle.ts
+++ b/src/utils/turbo_rates_oracle.ts
@@ -1,7 +1,13 @@
-import { TurboFactory, TurboRatesResponse } from '@ardrive/turbo-sdk';
+import {
+	TurboFactory,
+	TurboRatesResponse,
+	TurboUnauthenticatedClient
+} from '@ardrive/turbo-sdk';
 
 export class TurboRatesOracle implements RatesOracle {
-	private turbo = TurboFactory.unauthenticated();
+	constructor(
+		private turbo: TurboUnauthenticatedClient = TurboFactory.unauthenticated()
+	) {}
 
 	public async getTurboRates(): Promise<TurboRatesResponse> {
 		return this.turbo.getFiatRates();