diff --git a/tests/api/test_rsa.c b/tests/api/test_rsa.c
index 97354217e..40786e467 100644
--- a/tests/api/test_rsa.c
+++ b/tests/api/test_rsa.c
@@ -28,6 +28,10 @@
     #include <wolfcrypt/src/misc.c>
 #endif
 
+#ifdef WOLFSSL_ASYNC_CRYPT
+    #define WOLFSSL_SMALL_STACK
+#endif
+
 #include <wolfssl/wolfcrypt/rsa.h>
 #include <wolfssl/wolfcrypt/types.h>
 #include <tests/api/api.h>
diff --git a/wolfcrypt/benchmark/benchmark.c b/wolfcrypt/benchmark/benchmark.c
index a4f2df83a..8e77f5800 100644
--- a/wolfcrypt/benchmark/benchmark.c
+++ b/wolfcrypt/benchmark/benchmark.c
@@ -69,6 +69,9 @@
 /* Macro to disable benchmark */
 #ifndef NO_CRYPT_BENCHMARK
 
+#ifdef WOLFSSL_ASYNC_CRYPT
+    #define WOLFSSL_SMALL_STACK
+#endif
 #define WC_ALLOC_DO_ON_FAILURE() do { printf("out of memory at benchmark.c L %d\n", __LINE__); ret = MEMORY_E; goto exit; } while (0)
 
 #include <wolfssl/wolfcrypt/types.h>
diff --git a/wolfcrypt/test/test.c b/wolfcrypt/test/test.c
index b03b70089..1e8c87d45 100644
--- a/wolfcrypt/test/test.c
+++ b/wolfcrypt/test/test.c
@@ -43,6 +43,10 @@
     #define WOLFSSL_DEBUG_TRACE_ERROR_CODES_ALWAYS
 #endif
 
+#ifdef WOLFSSL_ASYNC_CRYPT
+    #define WOLFSSL_SMALL_STACK
+#endif
+
 #if !defined(NO_CRYPT_TEST) || defined(WC_TEST_EXPORT_SUBTESTS)
 
 #include <wolfssl/version.h>