diff --git a/tests/net/lib/lwm2m/interop/boards/native_sim.conf b/tests/net/lib/lwm2m/interop/boards/native_sim.conf
index 99b234c8e66..1d22c6b673f 100644
--- a/tests/net/lib/lwm2m/interop/boards/native_sim.conf
+++ b/tests/net/lib/lwm2m/interop/boards/native_sim.conf
@@ -7,3 +7,4 @@ CONFIG_NATIVE_SIM_SLOWDOWN_TO_REAL_TIME=y
 CONFIG_NATIVE_UART_0_ON_STDINOUT=y
 CONFIG_ASAN=y
 CONFIG_NATIVE_EXTRA_CMDLINE_ARGS="--seed-random"
+CONFIG_ZVFS_OPEN_MAX=16