diff --git a/tests/lib/c_lib/thrd/boards/qemu_x86.conf b/tests/lib/c_lib/thrd/boards/qemu_x86.conf
new file mode 100644
index 00000000000..2fa43926ee4
--- /dev/null
+++ b/tests/lib/c_lib/thrd/boards/qemu_x86.conf
@@ -0,0 +1 @@
+CONFIG_DYNAMIC_THREAD_STACK_SIZE=4096
diff --git a/tests/lib/c_lib/thrd/boards/qemu_x86_64.conf b/tests/lib/c_lib/thrd/boards/qemu_x86_64.conf
new file mode 100644
index 00000000000..2fa43926ee4
--- /dev/null
+++ b/tests/lib/c_lib/thrd/boards/qemu_x86_64.conf
@@ -0,0 +1 @@
+CONFIG_DYNAMIC_THREAD_STACK_SIZE=4096
diff --git a/tests/posix/common/boards/qemu_x86.conf b/tests/posix/common/boards/qemu_x86.conf
new file mode 100644
index 00000000000..2fa43926ee4
--- /dev/null
+++ b/tests/posix/common/boards/qemu_x86.conf
@@ -0,0 +1 @@
+CONFIG_DYNAMIC_THREAD_STACK_SIZE=4096
diff --git a/tests/posix/common/boards/qemu_x86_64.conf b/tests/posix/common/boards/qemu_x86_64.conf
new file mode 100644
index 00000000000..2fa43926ee4
--- /dev/null
+++ b/tests/posix/common/boards/qemu_x86_64.conf
@@ -0,0 +1 @@
+CONFIG_DYNAMIC_THREAD_STACK_SIZE=4096