diff --git a/test_conformance/compiler/test_compiler_defines_for_extensions.cpp b/test_conformance/compiler/test_compiler_defines_for_extensions.cpp
index c3f3993d..b9cfb608 100644
--- a/test_conformance/compiler/test_compiler_defines_for_extensions.cpp
+++ b/test_conformance/compiler/test_compiler_defines_for_extensions.cpp
@@ -94,6 +94,7 @@ const char *known_extensions[] = {
     "cl_khr_external_memory_dma_buf",
     "cl_khr_command_buffer",
     "cl_khr_command_buffer_mutable_dispatch",
+    "cl_khr_command_buffer_mutable_memory_commands",
     "cl_khr_command_buffer_multi_device",
     "cl_khr_external_memory_android_hardware_buffer",
     "cl_khr_unified_svm",