diff --git a/sys/psa_crypto/Makefile.dep b/sys/psa_crypto/Makefile.dep
index c4026a053e..b117add048 100644
--- a/sys/psa_crypto/Makefile.dep
+++ b/sys/psa_crypto/Makefile.dep
@@ -1,6 +1,6 @@
 ifneq (,$(filter psa_crypto,$(USEMODULE)))
   USEMODULE += random
-  USEMODULE += prng_musl_lcg
+  USEMODULE += prng_sha256prng
 endif
 
 # Asymmetric
diff --git a/tests/sys/psa_crypto_hashes/Makefile.ci b/tests/sys/psa_crypto_hashes/Makefile.ci
index 72db76ccb5..363d4f3a79 100644
--- a/tests/sys/psa_crypto_hashes/Makefile.ci
+++ b/tests/sys/psa_crypto_hashes/Makefile.ci
@@ -1,3 +1,4 @@
 BOARD_INSUFFICIENT_MEMORY := \
     atmega8 \
+    nucleo-l011k4 \
     #