diff --git a/src/main/java/com/ginsberg/gatherers4j/ThrottlingGatherer.java b/src/main/java/com/ginsberg/gatherers4j/ThrottlingGatherer.java
index 9f02ed7..cc75422 100644
--- a/src/main/java/com/ginsberg/gatherers4j/ThrottlingGatherer.java
+++ b/src/main/java/com/ginsberg/gatherers4j/ThrottlingGatherer.java
@@ -92,7 +92,7 @@ private void resetPeriod() {
             remainingPermits = allowedPerPeriod;
         }
 
-        // TODO: Is it safe to assume this is single threaded?
+        // Assuming this is not run in parallel. Gate with a lock if that assumption fails/changes.
         boolean attempt() {
             final long now = clock.millis();
             if(now < thisPeriodEnd) {
diff --git a/src/test/java/com/ginsberg/gatherers4j/ThrottlingGathererTest.java b/src/test/java/com/ginsberg/gatherers4j/ThrottlingGathererTest.java
index 349e465..2e80453 100644
--- a/src/test/java/com/ginsberg/gatherers4j/ThrottlingGathererTest.java
+++ b/src/test/java/com/ginsberg/gatherers4j/ThrottlingGathererTest.java
@@ -54,7 +54,7 @@ void clockMustNotBeNull() {
 
     @Test
     void defaultsRuleToPause() {
-        // Arrante/Act
+        // Arrange/Act
         final ThrottlingGatherer<String> gatherer = new ThrottlingGatherer<>(null, 1, Duration.ofSeconds(1));
 
         // Assert