diff --git a/Kconfig.zephyr b/Kconfig.zephyr
index e7b6ade16c5..b623b2892c0 100644
--- a/Kconfig.zephyr
+++ b/Kconfig.zephyr
@@ -27,6 +27,8 @@ osource "$(KCONFIG_BINARY_DIR)/Kconfig.soc.defconfig"
 osource "soc/$(ARCH)/*/Kconfig.defconfig"
 # This loads the toolchain defconfigs
 osource "$(TOOLCHAIN_KCONFIG_DIR)/Kconfig.defconfig"
+# This loads the testsuite defconfig
+source "subsys/testsuite/Kconfig.defconfig"
 
 # This should be early since the autogen Kconfig.dts symbols may get
 # used by modules
diff --git a/subsys/testsuite/Kconfig.defconfig b/subsys/testsuite/Kconfig.defconfig
new file mode 100644
index 00000000000..429def054dd
--- /dev/null
+++ b/subsys/testsuite/Kconfig.defconfig
@@ -0,0 +1,10 @@
+# Copyright (c) 2022 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+if TEST
+
+choice RNG_GENERATOR_CHOICE
+	default XOSHIRO_RANDOM_GENERATOR if ZTRESS && ENTROPY_HAS_DRIVER
+endchoice
+
+endif # TEST