diff --git a/.travis.yml b/.travis.yml
index d4cf71ab56..65a08cbcd1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -14,7 +14,7 @@ matrix:
           script:
               - rustup component add rustfmt
               - rustup component add rust-src
-              - printf "\n\n[profile.dev]\ndebug = false\n" >> Cargo.toml
+              - sed -i "s/debug = 1/debug = false/g" Cargo.toml
               - cargo test --no-run  # let's measure compile time separately
               - cargo test
           env:
diff --git a/Cargo.toml b/Cargo.toml
index 317c637958..c7e1f1215a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,9 @@
 [workspace]
 members = [ "crates/*", "website/website-gen" ]
 
+[profile.dev]
+debug = 1 # only line info
+
 [profile.release]
 incremental = true
 debug = 1 # only line info