diff --git a/codex-rs/core/src/config/edit.rs b/codex-rs/core/src/config/edit.rs
index 05b58f077d..d3e0c5c068 100644
--- a/codex-rs/core/src/config/edit.rs
+++ b/codex-rs/core/src/config/edit.rs
@@ -556,11 +556,12 @@ impl ConfigDocument {
                                 .as_ref()
                                 .map(|service_tier| value(service_tier.to_string())),
                         );
-                        mutated |= self.write_profile_value(&["service_tier"], None);
+                        mutated |= self.write_profile_value(&["service_tier"], /*value*/ None);
                     }
                     None => {
-                        mutated |= self.write_profile_value(&["service_tier_id"], None);
-                        mutated |= self.write_profile_value(&["service_tier"], None);
+                        mutated |=
+                            self.write_profile_value(&["service_tier_id"], /*value*/ None);
+                        mutated |= self.write_profile_value(&["service_tier"], /*value*/ None);
                     }
                 }
                 Ok(mutated)
diff --git a/codex-rs/core/src/config/edit_tests.rs b/codex-rs/core/src/config/edit_tests.rs
index e1d65ede47..1d4b0e5413 100644
--- a/codex-rs/core/src/config/edit_tests.rs
+++ b/codex-rs/core/src/config/edit_tests.rs
@@ -109,7 +109,7 @@ service_tier = "flex"
     .expect("seed config");
 
     ConfigEditsBuilder::new(codex_home)
-        .set_service_tier(None)
+        .set_service_tier(/*service_tier*/ None)
         .apply_blocking()
         .expect("persist");
 
diff --git a/codex-rs/core/src/session/tests.rs b/codex-rs/core/src/session/tests.rs
index e7559462ef..6af4f321e1 100644
--- a/codex-rs/core/src/session/tests.rs
+++ b/codex-rs/core/src/session/tests.rs
@@ -33,7 +33,6 @@ use codex_protocol::AgentPath;
 use codex_protocol::ThreadId;
 use codex_protocol::account::PlanType as AccountPlanType;
 use codex_protocol::config_types::SERVICE_TIER_PRIORITY;
-use codex_protocol::config_types::ServiceTier;
 use codex_protocol::config_types::TrustLevel;
 use codex_protocol::exec_output::ExecToolCallOutput;
 use codex_protocol::models::FileSystemPermissions;