diff --git a/Sources/JSONAPI/Document/Document.swift b/Sources/JSONAPI/Document/Document.swift
index 1343559..a266216 100644
--- a/Sources/JSONAPI/Document/Document.swift
+++ b/Sources/JSONAPI/Document/Document.swift
@@ -408,8 +408,6 @@ extension Document: Decodable, CodableJSONAPIDocument where PrimaryResourceBody:
             throw DocumentDecodingError(error)
         }
 
-        // TODO come back to this and make robust
-
         guard let metaVal = meta else {
             throw JSONAPICodingError.missingOrMalformedMetadata(path: decoder.codingPath)
         }
diff --git a/Sources/JSONAPI/SparseFields/SparseFieldEncoder.swift b/Sources/JSONAPI/SparseFields/SparseFieldEncoder.swift
index 36a1a95..2c555bd 100644
--- a/Sources/JSONAPI/SparseFields/SparseFieldEncoder.swift
+++ b/Sources/JSONAPI/SparseFields/SparseFieldEncoder.swift
@@ -158,7 +158,7 @@ struct SparseFieldKeyedEncodingContainer<Key, SparseKey>: KeyedEncodingContainer
                                                     forKey key: Key) -> KeyedEncodingContainer<NestedKey> where NestedKey : CodingKey {
         guard shouldAllow(key: key) else {
             return KeyedEncodingContainer(
-                // TODO: not needed by JSONAPI library, but for completeness could
+                // NOTE: not needed by JSONAPI library, but for completeness could
                 //      add an EmptyObjectEncoder that can be returned here so that
                 //      at least nothing gets encoded within the nested container
                 SparseFieldKeyedEncodingContainer<NestedKey, SparseKey>(wrapping: wrappedContainer.nestedContainer(keyedBy: keyType,
@@ -176,7 +176,7 @@ struct SparseFieldKeyedEncodingContainer<Key, SparseKey>: KeyedEncodingContainer
 
     public mutating func nestedUnkeyedContainer(forKey key: Key) -> UnkeyedEncodingContainer {
         guard shouldAllow(key: key) else {
-            // TODO: not needed by JSONAPI library, but for completeness could
+            // NOTE: not needed by JSONAPI library, but for completeness could
             //      add an EmptyObjectEncoder that can be returned here so that
             //      at least nothing gets encoded within the nested container
             return wrappedContainer.nestedUnkeyedContainer(forKey: key)
diff --git a/Tests/JSONAPITestingTests/Comparisons/Optional+AbstractWrapper.swift b/Sources/JSONAPITesting/Comparisons/Optional+AbstractWrapper.swift
similarity index 100%
rename from Tests/JSONAPITestingTests/Comparisons/Optional+AbstractWrapper.swift
rename to Sources/JSONAPITesting/Comparisons/Optional+AbstractWrapper.swift