diff --git a/utils/swift_build_support/swift_build_support/products/swift_testing.py b/utils/swift_build_support/swift_build_support/products/swift_testing.py
index 4693726c90394..4fac34214f2e5 100644
--- a/utils/swift_build_support/swift_build_support/products/swift_testing.py
+++ b/utils/swift_build_support/swift_build_support/products/swift_testing.py
@@ -99,8 +99,8 @@ def clean(self, host_target):
     def build(self, host_target):
         override_deployment_version = None
         if host_target.startswith('macosx'):
-            if Version(self.args.darwin_deployment_version_osx) < Version('10.15'):
-                override_deployment_version = '10.15'
+            if Version(self.args.darwin_deployment_version_osx) < Version('14.0'):
+                override_deployment_version = '14.0'
 
             # On Darwin platforms, specify a module ABI name suffix so that this
             # copy does not encounter runtime conflicts with a copy loaded from