diff --git a/Source/ViewControllerPresentationSpy.xcodeproj/project.pbxproj b/Source/ViewControllerPresentationSpy.xcodeproj/project.pbxproj
index db5ac0e..4d95edf 100644
--- a/Source/ViewControllerPresentationSpy.xcodeproj/project.pbxproj
+++ b/Source/ViewControllerPresentationSpy.xcodeproj/project.pbxproj
@@ -297,6 +297,7 @@
 					XCTest,
 					"-weak-lXCTestSwiftSupport",
 				);
+				OTHER_SWIFT_FLAGS = "-enable-upcoming-feature DisableOutwardActorInference";
 				PRODUCT_BUNDLE_IDENTIFIER = "org.qualitycoding.${TARGET_NAME}";
 				PRODUCT_NAME = ViewControllerPresentationSpy;
 				SDKROOT = iphoneos;
@@ -349,6 +350,7 @@
 					XCTest,
 					"-weak-lXCTestSwiftSupport",
 				);
+				OTHER_SWIFT_FLAGS = "-enable-upcoming-feature DisableOutwardActorInference";
 				PRODUCT_BUNDLE_IDENTIFIER = "org.qualitycoding.${TARGET_NAME}";
 				PRODUCT_NAME = ViewControllerPresentationSpy;
 				SDKROOT = iphoneos;