diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 72d8e43430..c3a7845212 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -18,6 +18,7 @@ on:
 
 env:
   CI: 1
+  RUSTFLAGS: "-D warnings"
 
 # On PR events, cancel existing CI runs on this same PR for this workflow.
 concurrency:
diff --git a/Cargo.toml b/Cargo.toml
index 2b5f598c2c..1c2f3410ec 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -250,14 +250,17 @@ validator = "0.12"
 void = "1.0.2"
 zstd = "0.13.1"
 
+# Note: both rust and clippy lints are warning by default and denied on the CI (see run_tests.py).
+# To deny warnings in local dev env:
+# - In the terminal: add to .bashrc `export RUSTFLAGS="$RUSTFLAGS -Dwarnings"
+# - In vscode, add to settings.json "rust-analyzer.cargo.extraEnv": { "RUSTFLAGS": "-Dwarnings" }
 [workspace.lints.rust]
-future-incompatible = "deny"
-nonstandard-style = "deny"
-rust-2018-idioms = "deny"
+future-incompatible = "warn"
+nonstandard-style = "warn"
+rust-2018-idioms = "warn"
 # See [here](https://github.com/taiki-e/cargo-llvm-cov/issues/370) for a discussion on why this is
 # needed (from rust 1.80).
 unexpected_cfgs = { level = "warn", check-cfg = ['cfg(coverage_nightly)'] }
-warnings = "deny"
 
 [workspace.lints.clippy]
-as_conversions = "deny"
+as_conversions = "warn"
diff --git a/scripts/clippy.sh b/scripts/clippy.sh
deleted file mode 100755
index 3eaef6844c..0000000000
--- a/scripts/clippy.sh
+++ /dev/null
@@ -1,8 +0,0 @@
-#!/bin/bash
-
-# TODO: Revert clippy::unwrap_used to -D after fixing all the unwraps.
-cargo clippy --all-targets --all-features $@ -- \
-    -D future-incompatible \
-    -D nonstandard-style \
-    -D rust-2018-idioms \
-    -D unused \