diff --git a/.buildkite/pipeline.yml b/.buildkite/pipeline.yml
index 961c056dfc..c9b4e450ac 100644
--- a/.buildkite/pipeline.yml
+++ b/.buildkite/pipeline.yml
@@ -46,7 +46,7 @@ steps:
           using Pkg
           Pkg.resolve()'
     commands: |
-      printf "[MLDataDevices]\ngpu_backend = \"Metal\"" > LocalPreferences.toml
+      printf "[MLDataDevices]\ngpu_backend = \"Metal\"\n" > LocalPreferences.toml
 
     if: build.message !~ /\[skip tests\]/
     timeout_in_minutes: 60
@@ -74,7 +74,7 @@ steps:
       rocm: "*"
       rocmgpu: "*"
     commands: |
-      printf "[MLDataDevices]\ngpu_backend = \"AMDGPU\"" > LocalPreferences.toml
+      printf "[MLDataDevices]\ngpu_backend = \"AMDGPU\"\n" > LocalPreferences.toml
     timeout_in_minutes: 60
     env:
       JULIA_AMDGPU_CORE_MUST_LOAD: "1"