diff --git a/src/test/kernel/test_kernel.cpp b/src/test/kernel/test_kernel.cpp
index 4a97f5ba467..223dbd4ea8c 100644
--- a/src/test/kernel/test_kernel.cpp
+++ b/src/test/kernel/test_kernel.cpp
@@ -6,6 +6,8 @@
 #include <kernel/bitcoinkernel_wrapper.h>
 #include <util/fs.h>
 
+// Boost.Test's SIGSTKSZ alternate stack can be smaller than Linux requires on musl.
+#define BOOST_TEST_DISABLE_ALT_STACK
 #define BOOST_TEST_MODULE Bitcoin Kernel Test Suite
 #include <boost/test/included/unit_test.hpp>
 
diff --git a/src/test/main.cpp b/src/test/main.cpp
index 0b7c451a582..f9a59e658ce 100644
--- a/src/test/main.cpp
+++ b/src/test/main.cpp
@@ -5,6 +5,8 @@
 /**
  * See https://www.boost.org/doc/libs/1_78_0/libs/test/doc/html/boost_test/adv_scenarios/single_header_customizations/multiple_translation_units.html
  */
+// Boost.Test's SIGSTKSZ alternate stack can be smaller than Linux requires on musl.
+#define BOOST_TEST_DISABLE_ALT_STACK
 #define BOOST_TEST_MODULE Bitcoin Core Test Suite
 
 #include <boost/test/included/unit_test.hpp>