diff --git a/lib/__tests__/HookTester.js b/lib/__tests__/HookTester.js
index 9d9ca37..b436fbd 100644
--- a/lib/__tests__/HookTester.js
+++ b/lib/__tests__/HookTester.js
@@ -666,13 +666,16 @@ class HookTester {
 		}
 
 		{
-			const hook = this.createHook(["x"], `${type}SinglePromiseWithUndefinedArg`);
+			const hook = this.createHook(
+				["x"],
+				`${type}SinglePromiseWithUndefinedArg`
+			);
 			hook.tapPromise("promise", (arg) => {
 				result[`${type}SinglePromiseWithUndefinedCalled1`] = arg;
 				return Promise.resolve(undefined);
 			});
-			result[`${type}SinglePromiseWithUndefined`] = await this.gainResult((cb) =>
-				hook[type](42, cb)
+			result[`${type}SinglePromiseWithUndefined`] = await this.gainResult(
+				(cb) => hook[type](42, cb)
 			);
 		}
 
@@ -699,13 +702,16 @@ class HookTester {
 		}
 
 		{
-			const hook = this.createHook(["x"], `${type}SinglePromiseWithEmptyStringArg`);
+			const hook = this.createHook(
+				["x"],
+				`${type}SinglePromiseWithEmptyStringArg`
+			);
 			hook.tapPromise("promise", (arg) => {
 				result[`${type}SinglePromiseWithEmptyStringArgCalled1`] = arg;
-				return Promise.resolve('');
+				return Promise.resolve("");
 			});
-			result[`${type}SinglePromiseWithEmptyStringArg`] = await this.gainResult((cb) =>
-				hook[type](42, cb)
+			result[`${type}SinglePromiseWithEmptyStringArg`] = await this.gainResult(
+				(cb) => hook[type](42, cb)
 			);
 		}