diff --git a/XCTestBootstrap/Strategies/FBLogicTestRunStrategy.m b/XCTestBootstrap/Strategies/FBLogicTestRunStrategy.m
index 7a3f502de..e1e474e3e 100644
--- a/XCTestBootstrap/Strategies/FBLogicTestRunStrategy.m
+++ b/XCTestBootstrap/Strategies/FBLogicTestRunStrategy.m
@@ -314,7 +314,7 @@ - (instancetype)initWithTarget:(id<FBiOSTarget, FBProcessSpawnCommands, FBXCTest
     [FBCollectionInformation oneLineDescriptionFromDictionary:environment]
   ];
   FBProcessIO *io = [[FBProcessIO alloc] initWithStdIn:nil stdOut:[FBProcessOutput outputForDataConsumer:outputs.stdOutConsumer] stdErr:[FBProcessOutput outputForDataConsumer:outputs.stdErrConsumer]];
-  FBProcessSpawnConfiguration *configuration = [[FBProcessSpawnConfiguration alloc] initWithLaunchPath:launchPath arguments:arguments environment:environment io:io mode:FBProcessSpawnModeDefault];
+  FBProcessSpawnConfiguration *configuration = [[FBProcessSpawnConfiguration alloc] initWithLaunchPath:launchPath arguments:arguments environment:environment io:io mode:FBProcessSpawnModePosixSpawn];
 
   return [[self.target
     launchProcess:configuration]