diff --git a/test/ModuleInterface/Observable.swift b/test/ModuleInterface/Observable.swift
index 181a4325ef231..e510c8ffab3d1 100644
--- a/test/ModuleInterface/Observable.swift
+++ b/test/ModuleInterface/Observable.swift
@@ -3,6 +3,9 @@
 // RUN: %target-swift-typecheck-module-from-interface(%t/Library.swiftinterface) -module-name Library -disable-availability-checking
 // RUN: %FileCheck %s < %t/Library.swiftinterface
 
+// Asserts is required for '-enable-experimental-feature InitAccessors'.
+// REQUIRES: asserts
+
 // REQUIRES: swift_swift_parser
 // REQUIRES: observation
 
diff --git a/test/stdlib/Observation/Observable.swift b/test/stdlib/Observation/Observable.swift
index d7ead2e4f65ea..89a33cd4630f5 100644
--- a/test/stdlib/Observation/Observable.swift
+++ b/test/stdlib/Observation/Observable.swift
@@ -2,6 +2,9 @@
 
 // RUN: %target-run-simple-swift( -Xfrontend -disable-availability-checking -parse-as-library -enable-experimental-feature InitAccessors -enable-experimental-feature Macros -Xfrontend -plugin-path -Xfrontend %swift-host-lib-dir/plugins)
 
+// Asserts is required for '-enable-experimental-feature InitAccessors'.
+// REQUIRES: asserts
+
 // REQUIRES: observation
 // REQUIRES: concurrency
 // REQUIRES: objc_interop