diff --git a/test/SILGen/magic_identifier_file.swift b/test/SILGen/magic_identifier_file.swift
index f2cfeecfc73d4..f2a41d9a62829 100644
--- a/test/SILGen/magic_identifier_file.swift
+++ b/test/SILGen/magic_identifier_file.swift
@@ -1,5 +1,5 @@
-// RUN: %target-swift-emit-silgen -module-name Foo %s | %FileCheck --check-prefixes=BOTH,ABSOLUTE %s
-// RUN: %target-swift-emit-silgen -enable-experimental-concise-pound-file -DNEEDS_CONCISE -module-name Foo %s | %FileCheck --check-prefixes=BOTH,CONCISE %s
+// RUN: %target-swift-emit-silgen -module-name Foo %/s | %FileCheck --check-prefixes=BOTH,ABSOLUTE %s
+// RUN: %target-swift-emit-silgen -enable-experimental-concise-pound-file -DNEEDS_CONCISE -module-name Foo %/s | %FileCheck --check-prefixes=BOTH,CONCISE %s
 
 // FIXME: Once this feature becomes non-experimental, we should update existing
 // tests and delete this file.
diff --git a/test/SILGen/magic_identifier_filepath.swift b/test/SILGen/magic_identifier_filepath.swift
index 3a407b0da9f0a..dcda58e6a6d6b 100644
--- a/test/SILGen/magic_identifier_filepath.swift
+++ b/test/SILGen/magic_identifier_filepath.swift
@@ -1,5 +1,5 @@
 // Check that we generate the right code with the flag.
-// RUN: %target-swift-emit-silgen -enable-experimental-concise-pound-file -module-name Foo %s | %FileCheck %s
+// RUN: %target-swift-emit-silgen -enable-experimental-concise-pound-file -module-name Foo %/s | %FileCheck %s
 
 // Check that we give errors for use of #filePath if concise #file isn't enabled.
 // FIXME: Drop if we stop rejecting this.