diff --git a/test/Runtime/protocol-conformance-cache-objc.swift b/test/Runtime/protocol-conformance-cache-objc.swift
index d381c74f6675e..3c2eedfbe7fc0 100644
--- a/test/Runtime/protocol-conformance-cache-objc.swift
+++ b/test/Runtime/protocol-conformance-cache-objc.swift
@@ -1,6 +1,6 @@
 // RUN: %empty-directory(%t)
 // RUN: %target-build-swift %s -o %t/a.out
-// RUN: env SWIFT_DEBUG_ENABLE_PROTOCOL_CONFORMANCES_LOOKUP_LOG=1 %target-run %t/a.out 2>&1 | %FileCheck %s
+// RUN: env %env-SWIFT_DEBUG_ENABLE_PROTOCOL_CONFORMANCES_LOOKUP_LOG=1 %target-run %t/a.out 2>&1 | %FileCheck %s
 
 // REQUIRES: executable_test
 // REQUIRES: objc_interop
diff --git a/test/Runtime/protocol-conformance-cache.swift b/test/Runtime/protocol-conformance-cache.swift
index e8db602364a1e..20ab6c76b6477 100644
--- a/test/Runtime/protocol-conformance-cache.swift
+++ b/test/Runtime/protocol-conformance-cache.swift
@@ -1,6 +1,6 @@
 // RUN: %empty-directory(%t)
 // RUN: %target-build-swift %s -o %t/a.out
-// RUN: env SWIFT_DEBUG_ENABLE_PROTOCOL_CONFORMANCES_LOOKUP_LOG=1 %target-run %t/a.out 2>&1 | %FileCheck %s
+// RUN: env %env-SWIFT_DEBUG_ENABLE_PROTOCOL_CONFORMANCES_LOOKUP_LOG=1 %target-run %t/a.out 2>&1 | %FileCheck %s
 
 // REQUIRES: executable_test
 // REQUIRES: swift_stdlib_asserts