diff --git a/beacon_node/beacon_chain/test_harness/src/bin.rs b/beacon_node/beacon_chain/test_harness/src/bin.rs
index df9ccd2229..3afc921dec 100644
--- a/beacon_node/beacon_chain/test_harness/src/bin.rs
+++ b/beacon_node/beacon_chain/test_harness/src/bin.rs
@@ -17,7 +17,7 @@ use validator_harness::ValidatorHarness;
 fn main() {
     let validator_file_path = keypairs_path();
 
-    fs::create_dir(validator_file_path.parent().unwrap()).unwrap();
+    let _ = fs::create_dir(validator_file_path.parent().unwrap());
 
     let matches = App::new("Lighthouse Test Harness Runner")
         .version("0.0.1")
diff --git a/eth2/types/src/test_utils/testing_beacon_state_builder.rs b/eth2/types/src/test_utils/testing_beacon_state_builder.rs
index 53481f0620..63d6f58778 100644
--- a/eth2/types/src/test_utils/testing_beacon_state_builder.rs
+++ b/eth2/types/src/test_utils/testing_beacon_state_builder.rs
@@ -25,10 +25,10 @@ pub struct TestingBeaconStateBuilder {
 }
 
 impl TestingBeaconStateBuilder {
-    /// Attempts to load validators from a file in the `CARGO_MANIFEST_DIR`. If the file is
-    /// unavailable, it generates the keys at runtime.
+    /// Attempts to load validators from a file in `$HOME/.lighthouse/keypairs.raw_keypairs`. If
+    /// the file is unavailable, it generates the keys at runtime.
     ///
-    /// If the `CARGO_MANIFEST_DIR` environment variable is not set, the local directory is used.
+    /// If the `$HOME` environment variable is not set, the local directory is used.
     ///
     /// See the `Self::from_keypairs_file` method for more info.
     ///