diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 6d3e99d7772..2498b59d8a8 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -122,6 +122,7 @@ test:
       QUICKCHECK_TESTS:            0
   script:
     - cargo test --verbose --all-features --no-fail-fast --workspace
+    - cargo test --verbose --all-features --no-fail-fast --workspace --doc
 
 docs:
   stage:                           workspace
@@ -375,7 +376,7 @@ fuzz-tests:
     <<:                              *docker-env
     variables:
         # The QUICKCHECK_TESTS default is 100
-        QUICKCHECK_TESTS:            40000
+        QUICKCHECK_TESTS:            20000
     rules:
         - if: $CI_PIPELINE_SOURCE == "schedule"
         - if: $CI_COMMIT_REF_NAME == "master"
diff --git a/crates/lang/macro/Cargo.toml b/crates/lang/macro/Cargo.toml
index 5deffc91d9e..5451f841e02 100644
--- a/crates/lang/macro/Cargo.toml
+++ b/crates/lang/macro/Cargo.toml
@@ -28,6 +28,7 @@ ink_metadata = { version = "3.0.0-rc3", path = "../../metadata/" }
 ink_env = { version = "3.0.0-rc3", path = "../../env/" }
 ink_storage = { version = "3.0.0-rc3", path = "../../storage/" }
 ink_lang = { version = "3.0.0-rc3", path = ".." }
+ink_prelude = { version = "3.0.0-rc3", path = "../../prelude/" }
 
 trybuild = "1.0.24"
 scale-info = { version = "0.6", default-features = false, features = ["derive"] }
diff --git a/crates/lang/macro/src/lib.rs b/crates/lang/macro/src/lib.rs
index b3844a6fb3b..65c41916a08 100644
--- a/crates/lang/macro/src/lib.rs
+++ b/crates/lang/macro/src/lib.rs
@@ -397,6 +397,8 @@ use proc_macro::TokenStream;
 /// #
 /// #[ink::contract]
 /// mod greeter {
+///     use ink_prelude::format;
+///
 ///     #[ink(storage)]
 ///     pub struct Greeter;
 ///
@@ -410,7 +412,7 @@ use proc_macro::TokenStream;
 ///         }
 ///
 ///         #[ink(message, payable)]
-///         pub fn fund(&mut self) {
+///         pub fn fund(&self) {
 ///             let caller = self.env().caller();
 ///             let value = self.env().transferred_balance();
 ///             let message = format!("thanks for the funding of {:?} from {:?}", value, caller);