diff --git a/src/DiffEngine.Tests/DiffRunnerTests.cs b/src/DiffEngine.Tests/DiffRunnerTests.cs
index ed9acacf..f4b4087b 100644
--- a/src/DiffEngine.Tests/DiffRunnerTests.cs
+++ b/src/DiffEngine.Tests/DiffRunnerTests.cs
@@ -43,11 +43,11 @@ public async Task MaxInstancesToLaunch()
         {
             await Task.Delay(500);
             ProcessCleanup.Refresh();
-            var result = await DiffRunner.LaunchAsync(file1, "fake.txt");
+            var result = DiffRunner.Launch(file1, "fake.txt");
             await Task.Delay(300);
             await Assert.That(result).IsEqualTo(LaunchResult.StartedNewInstance);
             ProcessCleanup.Refresh();
-            result = await DiffRunner.LaunchAsync(file2, "fake.txt");
+            result = DiffRunner.Launch(file2, "fake.txt");
             await Assert.That(result).IsEqualTo(LaunchResult.TooManyRunningDiffTools);
             ProcessCleanup.Refresh();
             DiffRunner.Kill(file1, "fake.txt");
@@ -119,7 +119,7 @@ public async Task LaunchAndKillDisabled()
             await WaitForRunning(false);
             await Assert.That(IsRunning()).IsFalse();
             await Assert.That(ProcessCleanup.IsRunning(command)).IsFalse();
-            var result = await DiffRunner.LaunchAsync(file1, file2);
+            var result = DiffRunner.Launch(file1, file2);
             await Assert.That(result).IsEqualTo(LaunchResult.Disabled);
             Thread.Sleep(500);
             ProcessCleanup.Refresh();
@@ -170,7 +170,7 @@ public async Task LaunchAndKill()
         await WaitForRunning(false);
         await Assert.That(IsRunning()).IsFalse();
         await Assert.That(ProcessCleanup.IsRunning(command)).IsFalse();
-        var result = await DiffRunner.LaunchAsync(file1, file2);
+        var result = DiffRunner.Launch(file1, file2);
         await Assert.That(result).IsEqualTo(LaunchResult.StartedNewInstance);
         await WaitForRunning(true);
         await Assert.That(IsRunning()).IsTrue();