diff --git a/Cargo.toml b/Cargo.toml
index 5a6c93d6493..1a5e32d1011 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -117,10 +117,9 @@ path = "parity/lib.rs"
 path = "parity/main.rs"
 name = "parity"
 
-[profile.dev]
-
 [profile.release]
 debug = false
+lto = true
 
 [workspace]
 # This should only list projects that are not
diff --git a/scripts/gitlab/test-linux.sh b/scripts/gitlab/test-linux.sh
index 2854508bb56..aac007ea63e 100755
--- a/scripts/gitlab/test-linux.sh
+++ b/scripts/gitlab/test-linux.sh
@@ -14,4 +14,5 @@ rustup default $1
 rustup show
 
 echo "________Running Parity Full Test Suite________"
-time cargo test $OPTIONS --features "$FEATURES" --locked --all --target $CARGO_TARGET --verbose --color=always -- --test-threads $THREADS
+# Why are we using RUSTFLAGS? See https://github.com/paritytech/parity-ethereum/pull/10719
+CARGO_INCREMENTAL=0 RUSTFLAGS="-C opt-level=3 -C overflow-checks=on -C debuginfo=2" time cargo test $OPTIONS --features "$FEATURES" --locked --all --target $CARGO_TARGET --verbose --color=never -- --test-threads $THREADS