diff --git a/RxTests/RxTests.xcodeproj/project.pbxproj b/RxTests/RxTests.xcodeproj/project.pbxproj
index d122d1ff..80a1425f 100644
--- a/RxTests/RxTests.xcodeproj/project.pbxproj
+++ b/RxTests/RxTests.xcodeproj/project.pbxproj
@@ -149,7 +149,6 @@
 		C84B8FC11B89D0D500C9CCCF /* BagTest.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = BagTest.swift; sourceTree = "<group>"; };
 		C85F4E421B7F70EA00A866C7 /* CompositeObserverTest.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = CompositeObserverTest.swift; sourceTree = "<group>"; };
 		C8633AE41B0A9FF300375D60 /* KVOObservableTests.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = KVOObservableTests.swift; sourceTree = "<group>"; };
-		C868D0EF1BB75EA1003D1474 /* main.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = main.swift; sourceTree = "<group>"; };
 		C868D0F81BB76A29003D1474 /* PerformanceTools.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = PerformanceTools.swift; sourceTree = "<group>"; };
 		C868D1091BB950D3003D1474 /* PerformanceTests.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = PerformanceTests.app; sourceTree = BUILT_PRODUCTS_DIR; };
 		C868D10B1BB950D4003D1474 /* main.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = main.swift; sourceTree = "<group>"; };
@@ -209,7 +208,6 @@
 				C8A468CC1B8A897800BF917B /* RxCocoa.framework */,
 				C836EA001B8A76A900AB941D /* RxSwift.framework */,
 				C81108221AF50E11001C13E4 /* Tests */,
-				C868D0EE1BB75EA1003D1474 /* PerformanceTests */,
 				C868D10A1BB950D4003D1474 /* PerformanceTests */,
 				C81108211AF50E11001C13E4 /* Products */,
 			);
@@ -338,14 +336,6 @@
 			path = Tests;
 			sourceTree = "<group>";
 		};
-		C868D0EE1BB75EA1003D1474 /* PerformanceTests */ = {
-			isa = PBXGroup;
-			children = (
-				C868D0EF1BB75EA1003D1474 /* main.swift */,
-			);
-			path = PerformanceTests;
-			sourceTree = "<group>";
-		};
 		C868D10A1BB950D4003D1474 /* PerformanceTests */ = {
 			isa = PBXGroup;
 			children = (
@@ -1040,6 +1030,7 @@
 				C868D1161BB950D4003D1474 /* Release-Tests */,
 			);
 			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
 		};
 		C88BB8B41B07E64B0064D411 /* Build configuration list for PBXNativeTarget "RxTests-OSX" */ = {
 			isa = XCConfigurationList;