diff --git a/tests/rust_libs/Makefile b/tests/rust_libs/Makefile
index a41e323007..6195a36951 100644
--- a/tests/rust_libs/Makefile
+++ b/tests/rust_libs/Makefile
@@ -5,6 +5,10 @@ USEMODULE += shell_democommands
 
 FEATURES_REQUIRED += rust_target
 
+# Testing on stable to ensure that no nightly features are needed when Rust is
+# pulled in through modules.
+CARGO_CHANNEL = stable
+
 # Currently unknown, something related to the LED_PORT definition that doesn't
 # pass C2Rust's transpilation
 BOARD_BLACKLIST := ek-lm4f120xl
diff --git a/tests/rust_minimal/Makefile b/tests/rust_minimal/Makefile
index 0f91d760be..72a112e7cf 100644
--- a/tests/rust_minimal/Makefile
+++ b/tests/rust_minimal/Makefile
@@ -5,9 +5,8 @@ BASELIBS += $(APPLICATION_RUST_MODULE).module
 
 FEATURES_REQUIRED += rust_target
 
-# This example can, on all platforms, be built with a stable version of Rust.
-# For most advanced features (eg. when using CoAP, SAUL or the shell with
-# Rust), this needs to be set to "nightly" for the time being.
+# Testing on stable to ensure that no nightly features are needed for basic
+# Rust usage.
 CARGO_CHANNEL = stable
 
 # Currently unknown, something related to the LED_PORT definition that doesn't