diff --git a/tests/posix/common/boards/intel_adsp_ace30_ptl.conf b/tests/posix/common/boards/intel_adsp_ace30_ptl.conf
new file mode 100644
index 00000000000..922c1e4b05f
--- /dev/null
+++ b/tests/posix/common/boards/intel_adsp_ace30_ptl.conf
@@ -0,0 +1 @@
+CONFIG_MAX_THREAD_BYTES=3
diff --git a/tests/posix/common/boards/intel_adsp_ace30_ptl_sim.conf b/tests/posix/common/boards/intel_adsp_ace30_ptl_sim.conf
new file mode 100644
index 00000000000..922c1e4b05f
--- /dev/null
+++ b/tests/posix/common/boards/intel_adsp_ace30_ptl_sim.conf
@@ -0,0 +1 @@
+CONFIG_MAX_THREAD_BYTES=3