diff --git a/lib/SerializerAppend.js b/lib/SerializerAppend.js
index efaac7ef..57afccda 100644
--- a/lib/SerializerAppend.js
+++ b/lib/SerializerAppend.js
@@ -487,7 +487,7 @@ class AppendSerializer {
               }
 
               const blockCount = Math.ceil(
-                (activeTable.nextByte % activeTable.logSize + contentLength) /
+                ((activeTable.nextByte % activeTable.logSize) + contentLength) /
                   activeTable.logSize,
               );
               let nextByte = activeTable.nextByte;
@@ -500,7 +500,7 @@ class AppendSerializer {
                   bufferIndex,
                   Math.min(
                     bufferIndex +
-                      (activeTable.logSize - nextByte % activeTable.logSize),
+                      (activeTable.logSize - (nextByte % activeTable.logSize)),
                     contentLength,
                   ),
                 );
diff --git a/lib/SerializerCacache.js b/lib/SerializerCacache.js
index ed320c05..7c3f89e3 100644
--- a/lib/SerializerCacache.js
+++ b/lib/SerializerCacache.js
@@ -9,8 +9,7 @@ class CacacheSerializer {
     const cache = {};
     const promises = [];
     return new Promise((resolve, reject) => {
-      cacache.ls
-        .stream(this.path)
+      cacache.ls.stream(this.path)
         .on('data', ({ key }) => {
           promises.push(
             cacache.get(this.path, key).then(({ data }) => {
diff --git a/lib/SerializerLeveldb.js b/lib/SerializerLeveldb.js
index 66028735..d8cd5187 100644
--- a/lib/SerializerLeveldb.js
+++ b/lib/SerializerLeveldb.js
@@ -18,8 +18,7 @@ class LevelDbSerializer {
         db =>
           new Promise((resolve, reject) => {
             const dbClose = promisify(db.close, { context: db });
-            db
-              .createReadStream()
+            db.createReadStream()
               .on('data', data => {
                 const value = data.value;
                 if (!moduleCache[data.key]) {
diff --git a/lib/SystemParity.js b/lib/SystemParity.js
index b63f49ab..f3ae24dd 100644
--- a/lib/SystemParity.js
+++ b/lib/SystemParity.js
@@ -1,4 +1,5 @@
 const pluginCompat = require('./util/plugin-compat');
+const logMessages = require('./util/log-messages');
 const { ParityRoot } = require('./util/parity');
 
 class ParitySystem {