diff --git a/CMakeLists.txt b/CMakeLists.txt
index d504cdebe40bb..b441e3bdab94e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -58,10 +58,6 @@ option(SWIFT_ENABLE_TARGET_LINUX
     "Enable compiler support for targeting Linux"
     TRUE)
 
-option(SWIFT_ENABLE_TARGET_TVOS
-    "Enable compiler support for targeting tvOS"
-    TRUE)
-
 set(SWIFT_VERSION "2.2" CACHE STRING
     "The user-visible version of the Swift compiler")
 set(SWIFT_VENDOR "" CACHE STRING
@@ -468,29 +464,27 @@ elseif("${CMAKE_SYSTEM_NAME}" STREQUAL "Darwin")
         IOS_SIMULATOR-R  "iOS Release"         IOS_SIMULATOR R "Release")
   endif()
 
-  if(${SWIFT_ENABLE_TARGET_TVOS})
-    is_sdk_requested(TVOS swift_build_tvos)
-    if(swift_build_tvos AND ${swift_can_crosscompile_stdlib})
-      configure_sdk_darwin(
-          TVOS "tvOS" "${SWIFT_DARWIN_DEPLOYMENT_VERSION_TVOS}"
-          appletvos tvos tvos "arm64")
-      configure_target_variant(TVOS-DA "tvOS Debug+Asserts"   TVOS DA "Debug+Asserts")
-      configure_target_variant(TVOS-RA "tvOS Release+Asserts" TVOS RA "Release+Asserts")
-      configure_target_variant(TVOS-R  "tvOS Release"         TVOS R "Release")
-    endif()
+  is_sdk_requested(TVOS swift_build_tvos)
+  if(swift_build_tvos AND ${swift_can_crosscompile_stdlib})
+    configure_sdk_darwin(
+        TVOS "tvOS" "${SWIFT_DARWIN_DEPLOYMENT_VERSION_TVOS}"
+        appletvos tvos tvos "arm64")
+    configure_target_variant(TVOS-DA "tvOS Debug+Asserts"   TVOS DA "Debug+Asserts")
+    configure_target_variant(TVOS-RA "tvOS Release+Asserts" TVOS RA "Release+Asserts")
+    configure_target_variant(TVOS-R  "tvOS Release"         TVOS R "Release")
+  endif()
 
-    is_sdk_requested(TVOS_SIMULATOR swift_build_tvos_simulator)
-    if(swift_build_tvos_simulator AND ${swift_can_crosscompile_stdlib})
-      configure_sdk_darwin(
-          TVOS_SIMULATOR "tvOS Simulator" "${SWIFT_DARWIN_DEPLOYMENT_VERSION_TVOS}"
-          appletvsimulator tvos-simulator tvos "x86_64")
-      configure_target_variant(
-        TVOS_SIMULATOR-DA "tvOS Debug+Asserts"   TVOS_SIMULATOR DA "Debug+Asserts")
-      configure_target_variant(
-        TVOS_SIMULATOR-RA "tvOS Release+Asserts" TVOS_SIMULATOR RA "Release+Asserts")
-      configure_target_variant(
-        TVOS_SIMULATOR-R  "tvOS Release"         TVOS_SIMULATOR R "Release")
-    endif()
+  is_sdk_requested(TVOS_SIMULATOR swift_build_tvos_simulator)
+  if(swift_build_tvos_simulator AND ${swift_can_crosscompile_stdlib})
+    configure_sdk_darwin(
+        TVOS_SIMULATOR "tvOS Simulator" "${SWIFT_DARWIN_DEPLOYMENT_VERSION_TVOS}"
+        appletvsimulator tvos-simulator tvos "x86_64")
+    configure_target_variant(
+      TVOS_SIMULATOR-DA "tvOS Debug+Asserts"   TVOS_SIMULATOR DA "Debug+Asserts")
+    configure_target_variant(
+      TVOS_SIMULATOR-RA "tvOS Release+Asserts" TVOS_SIMULATOR RA "Release+Asserts")
+    configure_target_variant(
+      TVOS_SIMULATOR-R  "tvOS Release"         TVOS_SIMULATOR R "Release")
   endif()
 
   is_sdk_requested(WATCHOS swift_build_watchos)
diff --git a/include/swift/AST/PlatformKinds.def b/include/swift/AST/PlatformKinds.def
index 3232ac0a59fa8..0a97d241d8907 100644
--- a/include/swift/AST/PlatformKinds.def
+++ b/include/swift/AST/PlatformKinds.def
@@ -23,15 +23,11 @@
 
 // Reordering these platforms will break serialization.
 AVAILABILITY_PLATFORM(iOS, "iOS")
-#if defined(SWIFT_ENABLE_TARGET_TVOS)
 AVAILABILITY_PLATFORM(tvOS, "tvOS")
-#endif // SWIFT_ENABLE_TARGET_TVOS
 AVAILABILITY_PLATFORM(watchOS, "watchOS")
 AVAILABILITY_PLATFORM(OSX, "OS X")
 AVAILABILITY_PLATFORM(iOSApplicationExtension, "iOS application extension")
-#if defined(SWIFT_ENABLE_TARGET_TVOS)
 AVAILABILITY_PLATFORM(tvOSApplicationExtension, "tvOS application extension")
-#endif // SWIFT_ENABLE_TARGET_TVOS
 AVAILABILITY_PLATFORM(watchOSApplicationExtension, "watchOS application extension")
 AVAILABILITY_PLATFORM(OSXApplicationExtension, "OS X application extension")
 
diff --git a/include/swift/Basic/Platform.h b/include/swift/Basic/Platform.h
index d6842394f695e..c60444a42ebfe 100644
--- a/include/swift/Basic/Platform.h
+++ b/include/swift/Basic/Platform.h
@@ -25,10 +25,8 @@ namespace swift {
   /// Returns true if the given triple represents iOS running in a simulator.
   bool tripleIsiOSSimulator(const llvm::Triple &triple);
 
-#if defined(SWIFT_ENABLE_TARGET_TVOS)
   /// Returns true if the given triple represents AppleTV running in a simulator.
   bool tripleIsAppleTVSimulator(const llvm::Triple &triple);
-#endif // SWIFT_ENABLE_TARGET_TVOS
 
   /// Returns true if the given triple represents watchOS running in a simulator.
   bool tripleIsWatchSimulator(const llvm::Triple &triple);
diff --git a/include/swift/Config.h.in b/include/swift/Config.h.in
index 5a14a73def893..a60eeb78487a2 100644
--- a/include/swift/Config.h.in
+++ b/include/swift/Config.h.in
@@ -4,7 +4,6 @@
 #ifndef SWIFT_CONFIG_H
 #define SWIFT_CONFIG_H
 
-#cmakedefine SWIFT_ENABLE_TARGET_TVOS 1
 #cmakedefine SWIFT_HAVE_WORKING_STD_REGEX 1
 
 #endif // SWIFT_CONFIG_H
diff --git a/lib/AST/PlatformKind.cpp b/lib/AST/PlatformKind.cpp
index 4482e98309678..dc1f5a51ffb05 100644
--- a/lib/AST/PlatformKind.cpp
+++ b/lib/AST/PlatformKind.cpp
@@ -70,16 +70,10 @@ bool swift::isPlatformActive(PlatformKind Platform, LangOptions &LangOpts) {
       return LangOpts.Target.isMacOSX();
     case PlatformKind::iOS:
     case PlatformKind::iOSApplicationExtension:
-      return LangOpts.Target.isiOS()
-#if defined(SWIFT_ENABLE_TARGET_TVOS)
-        && !LangOpts.Target.isTvOS()
-#endif // SWIFT_ENABLE_TARGET_TVOS
-        ;
-#if defined(SWIFT_ENABLE_TARGET_TVOS)
+      return LangOpts.Target.isiOS() && !LangOpts.Target.isTvOS();
     case PlatformKind::tvOS:
     case PlatformKind::tvOSApplicationExtension:
       return LangOpts.Target.isTvOS();
-#endif // SWIFT_ENABLE_TARGET_TVOS
     case PlatformKind::watchOS:
     case PlatformKind::watchOSApplicationExtension:
       return LangOpts.Target.isWatchOS();
@@ -96,13 +90,11 @@ PlatformKind swift::targetPlatform(LangOptions &LangOpts) {
                 : PlatformKind::OSX);
   }
 
-#if defined(SWIFT_ENABLE_TARGET_TVOS)
   if (LangOpts.Target.isTvOS()) {
     return (LangOpts.EnableAppExtensionRestrictions
             ? PlatformKind::tvOSApplicationExtension
             : PlatformKind::tvOS);
   }
-#endif // SWIFT_ENABLE_TARGET_TVOS
 
   if (LangOpts.Target.isWatchOS()) {
     return (LangOpts.EnableAppExtensionRestrictions
diff --git a/lib/Basic/LangOptions.cpp b/lib/Basic/LangOptions.cpp
index 5f56bbe9603ba..4ad980cbb4e40 100644
--- a/lib/Basic/LangOptions.cpp
+++ b/lib/Basic/LangOptions.cpp
@@ -25,9 +25,7 @@ using namespace swift;
 
 const std::vector<std::string> LangOptions::SupportedOSBuildConfigArguments = {
   "OSX",
-#if defined(SWIFT_ENABLE_TARGET_TVOS)
   "tvOS",
-#endif
   "watchOS",
   "iOS",
   "Linux"
@@ -92,10 +90,8 @@ std::pair<bool, bool> LangOptions::setTarget(llvm::Triple triple) {
   // Set the "os" target configuration.
   if (Target.isMacOSX())
     addTargetConfigOption("os", "OSX");
-#if defined(SWIFT_ENABLE_TARGET_TVOS)
   else if (triple.isTvOS())
     addTargetConfigOption("os", "tvOS");
-#endif // SWIFT_ENABLE_TARGET_TVOS
   else if (triple.isWatchOS())
     addTargetConfigOption("os", "watchOS");
   else if (triple.isiOS())
diff --git a/lib/Basic/Platform.cpp b/lib/Basic/Platform.cpp
index d2ecce74f7ada..a4808d1db918b 100644
--- a/lib/Basic/Platform.cpp
+++ b/lib/Basic/Platform.cpp
@@ -21,13 +21,11 @@ bool swift::tripleIsiOSSimulator(const llvm::Triple &triple) {
           (arch == llvm::Triple::x86 || arch == llvm::Triple::x86_64));
 }
 
-#if defined(SWIFT_ENABLE_TARGET_TVOS)
 bool swift::tripleIsAppleTVSimulator(const llvm::Triple &triple) {
   llvm::Triple::ArchType arch = triple.getArch();
   return (triple.isTvOS() &&
          (arch == llvm::Triple::x86 || arch == llvm::Triple::x86_64));
 }
-#endif // SWIFT_ENABLE_TARGET_TVOS
 
 bool swift::tripleIsWatchSimulator(const llvm::Triple &triple) {
   llvm::Triple::ArchType arch = triple.getArch();
@@ -36,23 +34,18 @@ bool swift::tripleIsWatchSimulator(const llvm::Triple &triple) {
 }
 
 bool swift::tripleIsAnySimulator(const llvm::Triple &triple) {
-#if defined(SWIFT_ENABLE_TARGET_TVOS)
-  if (tripleIsAppleTVSimulator(triple))
-    return true;
-#endif // SWIFT_ENABLE_TARGET_TVOS
-
-  return tripleIsiOSSimulator(triple) || tripleIsWatchSimulator(triple);
+  return tripleIsiOSSimulator(triple) ||
+      tripleIsWatchSimulator(triple) ||
+      tripleIsAppleTVSimulator(triple);
 }
 
 StringRef swift::getPlatformNameForTriple(const llvm::Triple &triple) {
   if (triple.isiOS()) {
-#if defined(SWIFT_ENABLE_TARGET_TVOS)
     if (triple.isTvOS()) {
       if (tripleIsAppleTVSimulator(triple))
         return "appletvsimulator";
       return "appletvos";
     }
-#endif // SWIFT_ENABLE_TARGET_TVOS
 
     if (tripleIsiOSSimulator(triple))
       return "iphonesimulator";
diff --git a/lib/ClangImporter/ClangImporter.cpp b/lib/ClangImporter/ClangImporter.cpp
index ac15faa098d03..52ff387b6d380 100644
--- a/lib/ClangImporter/ClangImporter.cpp
+++ b/lib/ClangImporter/ClangImporter.cpp
@@ -364,11 +364,7 @@ getNormalInvocationArguments(std::vector<std::string> &invocationArgStrs,
     unsigned major, minor, micro;
     if (triple.isiOS()) {
       bool isiOSSimulator = swift::tripleIsiOSSimulator(triple);
-#if defined(SWIFT_ENABLE_TARGET_TVOS)
       if (triple.isTvOS()) {
-#else
-      if (/* DISABLES CODE */ (false)) {
-#endif // SWIFT_ENABLE_TARGET_TVOS
         if (isiOSSimulator)
           minVersionOpt << "-mtvos-simulator-version-min=";
         else
@@ -1031,11 +1027,7 @@ ClangImporter::Implementation::Implementation(ASTContext &ctx,
   // applies in Swift, and if so, what is the cutoff for deprecated
   // declarations that are now considered unavailable in Swift.
 
-  if (ctx.LangOpts.Target.isiOS()
-#if defined(SWIFT_ENABLE_TARGET_TVOS)
-      && !ctx.LangOpts.Target.isTvOS()
-#endif // SWIFT_ENABLE_TARGET_TVOS
-  ) {
+  if (ctx.LangOpts.Target.isiOS() && !ctx.LangOpts.Target.isTvOS()) {
     if (!ctx.LangOpts.EnableAppExtensionRestrictions) {
       PlatformAvailabilityFilter =
         [](StringRef Platform) { return Platform == "ios"; };
@@ -1052,7 +1044,6 @@ ClangImporter::Implementation::Implementation(ASTContext &ctx,
     DeprecatedAsUnavailableMessage =
       "APIs deprecated as of iOS 7 and earlier are unavailable in Swift";
   }
-#if defined(SWIFT_ENABLE_TARGET_TVOS)
   else if (ctx.LangOpts.Target.isTvOS()) {
     if (!ctx.LangOpts.EnableAppExtensionRestrictions) {
       PlatformAvailabilityFilter =
@@ -1070,7 +1061,6 @@ ClangImporter::Implementation::Implementation(ASTContext &ctx,
     DeprecatedAsUnavailableMessage =
       "APIs deprecated as of iOS 7 and earlier are unavailable in Swift";
   }
-#endif // SWIFT_ENABLE_TARGET_TVOS
   else if (ctx.LangOpts.Target.isWatchOS()) {
     if (!ctx.LangOpts.EnableAppExtensionRestrictions) {
       PlatformAvailabilityFilter =
diff --git a/lib/ClangImporter/ImportDecl.cpp b/lib/ClangImporter/ImportDecl.cpp
index 2d1fa3a478bc8..cec89ba3147c1 100644
--- a/lib/ClangImporter/ImportDecl.cpp
+++ b/lib/ClangImporter/ImportDecl.cpp
@@ -5761,17 +5761,13 @@ void ClangImporter::Implementation::importAttributes(
         llvm::StringSwitch<Optional<PlatformKind>>(Platform)
           .Case("ios", PlatformKind::iOS)
           .Case("macosx", PlatformKind::OSX)
-#if defined(SWIFT_ENABLE_TARGET_TVOS)
           .Case("tvos", PlatformKind::tvOS)
-#endif // SWIFT_ENABLE_TARGET_TVOS
           .Case("watchos", PlatformKind::watchOS)
           .Case("ios_app_extension", PlatformKind::iOSApplicationExtension)
           .Case("macosx_app_extension",
                 PlatformKind::OSXApplicationExtension)
-#if defined(SWIFT_ENABLE_TARGET_TVOS)
           .Case("tvos_app_extension",
                 PlatformKind::tvOSApplicationExtension)
-#endif // SWIFT_ENABLE_TARGET_TVOS
           .Case("watchos_app_extension",
                 PlatformKind::watchOSApplicationExtension)
           .Default(None);
diff --git a/lib/Driver/Driver.cpp b/lib/Driver/Driver.cpp
index 19a151fdd0510..64fd4b6ba4149 100644
--- a/lib/Driver/Driver.cpp
+++ b/lib/Driver/Driver.cpp
@@ -129,7 +129,6 @@ static void validateArgs(DiagnosticEngine &diags, const ArgList &Args) {
         diags.diagnose(SourceLoc(), diag::error_os_minimum_deployment,
                        "OS X 10.9");
     } else if (triple.isiOS()) {
-#if defined(SWIFT_ENABLE_TARGET_TVOS)
       if (triple.isTvOS()) {
         if (triple.isOSVersionLT(9, 0)) {
           diags.diagnose(SourceLoc(), diag::error_os_minimum_deployment,
@@ -137,7 +136,6 @@ static void validateArgs(DiagnosticEngine &diags, const ArgList &Args) {
           return;
         }
       }
-#endif // SWIFT_ENABLE_TARGET_TVOS
       if (triple.isOSVersionLT(7))
         diags.diagnose(SourceLoc(), diag::error_os_minimum_deployment,
                        "iOS 7");
@@ -2024,9 +2022,7 @@ const ToolChain *Driver::getToolChain(const ArgList &Args) const {
     case llvm::Triple::Darwin:
     case llvm::Triple::MacOSX:
     case llvm::Triple::IOS:
-#if defined(SWIFT_ENABLE_TARGET_TVOS)
     case llvm::Triple::TvOS:
-#endif // SWIFT_ENABLE_TARGET_TVOS
     case llvm::Triple::WatchOS:
       TC = new toolchains::Darwin(*this, Target);
       break;
diff --git a/lib/Driver/ToolChains.cpp b/lib/Driver/ToolChains.cpp
index 95c4ca4c1a045..8434da7ce2ba1 100644
--- a/lib/Driver/ToolChains.cpp
+++ b/lib/Driver/ToolChains.cpp
@@ -866,11 +866,9 @@ toolchains::Darwin::constructInvocation(const LinkJobAction &job,
 
     StringRef RT;
     if (Triple.isiOS()) {
-#if defined(SWIFT_ENABLE_TARGET_TVOS)
       if (Triple.isTvOS())
         RT = "tvos";
       else
-#endif // SWIFT_ENABLE_TARGET_TVOS
         RT = "ios";
     }
     else if (Triple.isWatchOS())
@@ -891,15 +889,12 @@ toolchains::Darwin::constructInvocation(const LinkJobAction &job,
   assert(Triple.isiOS() || Triple.isWatchOS() || Triple.isMacOSX());
   if (Triple.isiOS()) {
     bool isiOSSimulator = tripleIsiOSSimulator(Triple);
-#if defined(SWIFT_ENABLE_TARGET_TVOS)
     if (Triple.isTvOS()) {
       if (isiOSSimulator)
         Arguments.push_back("-tvos_simulator_version_min");
       else
         Arguments.push_back("-tvos_version_min");
-    } else
-#endif // SWIFT_ENABLE_TARGET_TVOS
-    {
+    } else {
       if (isiOSSimulator)
         Arguments.push_back("-ios_simulator_version_min");
       else
diff --git a/test/BuildConfigurations/arm64AppleTVOSTarget.swift b/test/BuildConfigurations/arm64AppleTVOSTarget.swift
index 85fe286cf033a..43259400cc419 100644
--- a/test/BuildConfigurations/arm64AppleTVOSTarget.swift
+++ b/test/BuildConfigurations/arm64AppleTVOSTarget.swift
@@ -1,8 +1,6 @@
 // RUN: %swift -parse %s -verify -D FOO -D BAR -target arm64-apple-tvos9.0 -D FOO -parse-stdlib
 // RUN: %swift-ide-test -test-input-complete -source-filename=%s -target arm64-apple-tvos9.0
 
-// REQUIRES: enable_target_appletvos
-
 #if os(iOS)
 // This block should not parse.
 // os(tvOS) or os(watchOS) does not imply os(iOS).
diff --git a/test/BuildConfigurations/i386AppleTVOSTarget.swift b/test/BuildConfigurations/i386AppleTVOSTarget.swift
index b092b770e939f..0a4183945bd52 100644
--- a/test/BuildConfigurations/i386AppleTVOSTarget.swift
+++ b/test/BuildConfigurations/i386AppleTVOSTarget.swift
@@ -1,8 +1,6 @@
 // RUN: %swift -parse %s -verify -D FOO -D BAR -target i386-apple-tvos9.0 -D FOO -parse-stdlib
 // RUN: %swift-ide-test -test-input-complete -source-filename=%s -target i386-apple-tvos9.0
 
-// REQUIRES: enable_target_appletvos
-
 #if os(iOS)
 // This block should not parse.
 // os(tvOS) or os(watchOS) does not imply os(iOS).
diff --git a/test/BuildConfigurations/x64AppleTVOSTarget.swift b/test/BuildConfigurations/x64AppleTVOSTarget.swift
index adf02ce4571c7..4f240ae010f5b 100644
--- a/test/BuildConfigurations/x64AppleTVOSTarget.swift
+++ b/test/BuildConfigurations/x64AppleTVOSTarget.swift
@@ -1,8 +1,6 @@
 // RUN: %swift -parse %s -verify -D FOO -D BAR -target x86_64-apple-tvos9.0 -D FOO -parse-stdlib
 // RUN: %swift-ide-test -test-input-complete -source-filename=%s -target x86_64-apple-tvos9.0
 
-// REQUIRES: enable_target_appletvos
-
 #if os(iOS)
 // This block should not parse.
 // os(tvOS) or os(watchOS) does not imply os(iOS).
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 6dae0be614f3c..d5b74f0470da7 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -105,11 +105,6 @@ if(PYTHONINTERP_FOUND)
     list(APPEND SWIFT_TEST_EXTRA_ARGS "--param" "leaks-all")
   endif()
 
-  if(NOT SWIFT_ENABLE_TARGET_APPLETVOS)
-    list(APPEND SWIFT_TEST_EXTRA_ARGS
-         "--param" "swift_enable_target_appletvos=false")
-  endif()
-
   if(NOT CMAKE_CFG_INTDIR STREQUAL ".")
     list(APPEND SWIFT_TEST_EXTRA_ARGS
          "--param" "build_mode=${CMAKE_CFG_INTDIR}")
diff --git a/test/Driver/linker.swift b/test/Driver/linker.swift
index bf082aad32e13..d25c4af80fc26 100644
--- a/test/Driver/linker.swift
+++ b/test/Driver/linker.swift
@@ -177,5 +177,3 @@
 // Clean up the test executable because hard links are expensive.
 // RUN: rm -rf %t/DISTINCTIVE-PATH/usr/bin/swiftc
 
-// REQUIRES: enable_target_appletvos
-
diff --git a/test/Driver/os-deployment.swift b/test/Driver/os-deployment.swift
index a3888e90667c0..4e97f69c7b329 100644
--- a/test/Driver/os-deployment.swift
+++ b/test/Driver/os-deployment.swift
@@ -9,4 +9,3 @@
 // CHECK-tvOS: Swift requires a minimum deployment target of tvOS 9.0
 // CHECK-watchOS: Swift requires a minimum deployment target of watchOS 2.0
 
-// REQUIRES: enable_target_appletvos
diff --git a/test/Driver/profiling.swift b/test/Driver/profiling.swift
index 5a2540496a112..7c09d439dbfaa 100644
--- a/test/Driver/profiling.swift
+++ b/test/Driver/profiling.swift
@@ -26,5 +26,3 @@
 // LINUX: clang++{{"? }}
 // LINUX: lib/swift/clang/{{[^ ]*}}/lib/linux/libclang_rt.profile-x86_64.a
 
-// REQUIRES: enable_target_appletvos
-
diff --git a/test/Driver/sdk-apple.swift b/test/Driver/sdk-apple.swift
index 734e3c7cd92fa..271a36bca3ef9 100644
--- a/test/Driver/sdk-apple.swift
+++ b/test/Driver/sdk-apple.swift
@@ -1,4 +1,3 @@
-// REQUIRES: enable_target_appletvos
 // XFAIL: linux
 
 // Test SDK detection for immediate mode.
diff --git a/test/IDE/complete_decl_attribute.swift b/test/IDE/complete_decl_attribute.swift
index 0938a84a6c1e0..115ca3bed1258 100644
--- a/test/IDE/complete_decl_attribute.swift
+++ b/test/IDE/complete_decl_attribute.swift
@@ -7,8 +7,6 @@
 // RUN: %target-swift-ide-test -code-completion -source-filename %s -code-completion-token=KEYWORD5 | FileCheck %s -check-prefix=KEYWORD5
 // RUN: %target-swift-ide-test -code-completion -source-filename %s -code-completion-token=KEYWORD_LAST | FileCheck %s -check-prefix=KEYWORD_LAST
 
-// REQUIRES: enable_target_appletvos
-
 @available(#^AVAILABILITY1^#)
 
 // AVAILABILITY1: Begin completions, 9 items
diff --git a/test/IRGen/generic_metatypes.swift b/test/IRGen/generic_metatypes.swift
index 954668d843192..42d2fcf47649f 100644
--- a/test/IRGen/generic_metatypes.swift
+++ b/test/IRGen/generic_metatypes.swift
@@ -12,7 +12,6 @@
 // RUN: %swift -target x86_64-unknown-linux-gnu -disable-objc-interop -emit-ir -parse-stdlib -primary-file %s | FileCheck --check-prefix=CHECK --check-prefix=CHECK-64 %s
 
 // REQUIRES: X86
-// REQUIRES: enable_target_appletvos
 
 // CHECK: define hidden %swift.type* [[GENERIC_TYPEOF:@_TF17generic_metatypes13genericTypeof.*]](%swift.opaque* noalias nocapture, %swift.type* [[TYPE:%.*]])
 func genericTypeof<T>(x: T) -> T.Type {
diff --git a/test/Interpreter/availability_weak_linking.swift b/test/Interpreter/availability_weak_linking.swift
index c4093fb12b8eb..cd09c11baa6e4 100644
--- a/test/Interpreter/availability_weak_linking.swift
+++ b/test/Interpreter/availability_weak_linking.swift
@@ -17,7 +17,6 @@
 
 // REQUIRES: objc_interop
 // REQUIRES: executable_test
-// REQUIRES: enable_target_appletvos
 
 import StdlibUnittest
 
diff --git a/test/Misc/target-cpu.swift b/test/Misc/target-cpu.swift
index 7d10d73845202..124eb6b8a28d0 100644
--- a/test/Misc/target-cpu.swift
+++ b/test/Misc/target-cpu.swift
@@ -37,5 +37,3 @@
 // RUN: not %swift -parse -target x86_64-apple-watchos2 -Xcc -### %s 2>&1 | FileCheck -check-prefix=WATCHSIMULATOR64_CPU %s
 // WATCHSIMULATOR64_CPU: "-target-cpu" "core2"
 
-// REQUIRES: enable_target_appletvos
-
diff --git a/test/attr/attr_availability.swift b/test/attr/attr_availability.swift
index 626331b4ab158..4e004b04bd20f 100644
--- a/test/attr/attr_availability.swift
+++ b/test/attr/attr_availability.swift
@@ -1,7 +1,5 @@
 // RUN: %target-parse-verify-swift
 
-// REQUIRES: enable_target_appletvos
-
 @available(*, unavailable)
 func unavailable_func() {}
 
diff --git a/test/attr/attr_availability_tvos.swift b/test/attr/attr_availability_tvos.swift
index b5a38e8908ba2..3e2a852d93642 100644
--- a/test/attr/attr_availability_tvos.swift
+++ b/test/attr/attr_availability_tvos.swift
@@ -1,7 +1,5 @@
 // RUN: %swift -parse -verify -parse-stdlib -target i386-apple-tvos9.0 %s
 
-// REQUIRES: enable_target_appletvos
-
 @available(tvOS, introduced=1.0, deprecated=2.0, obsoleted=9.0,
               message="you don't want to do that anyway")
 func doSomething() { }
diff --git a/test/lit.cfg b/test/lit.cfg
index 162cecfe3fc71..2dbdc5f3760ea 100644
--- a/test/lit.cfg
+++ b/test/lit.cfg
@@ -412,9 +412,6 @@ if swift_run_only_tests != 'all':
 else:
   config.available_features.add("executable_test")
 
-if lit_config.params.get('swift_enable_target_appletvos', 'true') == 'true':
-    config.available_features.add("enable_target_appletvos")
-
 # Add substitutions for the run target triple, CPU, OS, and pointer size.
 config.substitutions.append(('%target-triple', config.variant_triple))
 config.substitutions.append(('%target-cpu', run_cpu))
diff --git a/tools/SourceKit/lib/SwiftLang/SwiftDocSupport.cpp b/tools/SourceKit/lib/SwiftLang/SwiftDocSupport.cpp
index 4bb3bfc78cf62..e8e9716687e94 100644
--- a/tools/SourceKit/lib/SwiftLang/SwiftDocSupport.cpp
+++ b/tools/SourceKit/lib/SwiftLang/SwiftDocSupport.cpp
@@ -301,15 +301,11 @@ static void reportAttributes(ASTContext &Ctx,
   static UIdent AvailableAttrKind("source.lang.swift.attribute.availability");
   static UIdent PlatformIOS("source.availability.platform.ios");
   static UIdent PlatformOSX("source.availability.platform.osx");
-#if defined(SWIFT_ENABLE_TARGET_TVOS)
   static UIdent PlatformtvOS("source.availability.platform.tvos");
-#endif // SWIFT_ENABLE_TARGET_TVOS
   static UIdent PlatformWatchOS("source.availability.platform.watchos");
   static UIdent PlatformIOSAppExt("source.availability.platform.ios_app_extension");
   static UIdent PlatformOSXAppExt("source.availability.platform.osx_app_extension");
-#if defined(SWIFT_ENABLE_TARGET_TVOS)
   static UIdent PlatformtvOSAppExt("source.availability.platform.tvos_app_extension");
-#endif // SWIFT_ENABLE_TARGET_TVOS
   static UIdent PlatformWatchOSAppExt("source.availability.platform.watchos_app_extension");
 
   for (auto Attr : D->getAttrs()) {
@@ -322,20 +318,16 @@ static void reportAttributes(ASTContext &Ctx,
         PlatformUID = PlatformIOS; break;
       case PlatformKind::OSX:
         PlatformUID = PlatformOSX; break;
-#if defined(SWIFT_ENABLE_TARGET_TVOS)
       case PlatformKind::tvOS:
         PlatformUID = PlatformtvOS; break;
-#endif // SWIFT_ENABLE_TARGET_TVOS
       case PlatformKind::watchOS:
         PlatformUID = PlatformWatchOS; break;
       case PlatformKind::iOSApplicationExtension:
         PlatformUID = PlatformIOSAppExt; break;
       case PlatformKind::OSXApplicationExtension:
         PlatformUID = PlatformOSXAppExt; break;
-#if defined(SWIFT_ENABLE_TARGET_TVOS)
       case PlatformKind::tvOSApplicationExtension:
         PlatformUID = PlatformtvOSAppExt; break;
-#endif // SWIFT_ENABLE_TARGET_TVOS
       case PlatformKind::watchOSApplicationExtension:
         PlatformUID = PlatformWatchOSAppExt; break;
       }
diff --git a/utils/build-script-impl b/utils/build-script-impl
index 8c060d8a99fe8..c42f35a0c5fad 100755
--- a/utils/build-script-impl
+++ b/utils/build-script-impl
@@ -171,7 +171,6 @@ KNOWN_SETTINGS=(
     sil-verify-all              "0"              "If enabled, run the sil verifier be run after every SIL pass"
     swift-enable-ast-verifier   "1"              "If enabled, and the assertions are enabled, the built Swift compiler will run the AST verifier every time it is invoked"
     swift-enable-target-linux   "1"              "Enable compiler support for targeting Linux"
-    swift-enable-target-appletvos "1"            "Enable compiler support for targeting tvOS"
     swift-runtime-enable-dtrace "0"              "Enable runtime dtrace support"
     swift-runtime-enable-leak-checker   "0"              "Enable leaks checking routines in the runtime"
     use-gold-linker             ""               "Enable using the gold linker"
@@ -1421,7 +1420,6 @@ for deployment_target in "${NATIVE_TOOLS_DEPLOYMENT_TARGETS[@]}" "${CROSS_TOOLS_
             -D${PRODUCT}_PATH_TO_LLVM_BUILD:PATH="${llvm_build_dir}"
             -D${PRODUCT}_PATH_TO_CMARK_SOURCE:PATH="${CMARK_SOURCE_DIR}"
             -D${PRODUCT}_PATH_TO_CMARK_BUILD:PATH="$(build_directory $deployment_target cmark)"
-            -DSWIFT_ENABLE_TARGET_APPLETVOS:BOOL=$(true_false "${SWIFT_ENABLE_TARGET_APPLETVOS}")
         )
 
         if [[ "${CMAKE_GENERATOR}" != "Ninja" ]] ; then