diff --git a/packages/common-ts/src/common/logger.ts b/packages/common-ts/src/common/logger.ts
index 0c8c2b79c88c4..387521af3c5aa 100644
--- a/packages/common-ts/src/common/logger.ts
+++ b/packages/common-ts/src/common/logger.ts
@@ -41,7 +41,9 @@ export class Logger {
         }),
       })
     }
-    if (options.streams) loggerStreams = loggerStreams.concat(options.streams)
+    if (options.streams) {
+      loggerStreams = loggerStreams.concat(options.streams)
+    }
 
     this.inner = pino(loggerOptions, pinoms.multistream(loggerStreams))
   }
diff --git a/packages/hardhat-ovm/src/index.ts b/packages/hardhat-ovm/src/index.ts
index 3b95daec5f016..5fb17caf4c87d 100644
--- a/packages/hardhat-ovm/src/index.ts
+++ b/packages/hardhat-ovm/src/index.ts
@@ -47,8 +47,9 @@ const getOvmSolcPath = async (version: string): Promise<string> => {
   const ovmCompilersCache = path.join(await getCompilersDir(), 'ovm')
 
   // Need to create the OVM compiler cache folder if it doesn't already exist.
-  if (!fs.existsSync(ovmCompilersCache))
-    [fs.mkdirSync(ovmCompilersCache, { recursive: true })]
+  if (!fs.existsSync(ovmCompilersCache)) {
+    fs.mkdirSync(ovmCompilersCache, { recursive: true })
+  }
 
   // Pull information about the latest commit in the solc-bin repo. We'll use this to invalidate
   // our compiler cache if necessary.
@@ -186,7 +187,9 @@ subtask(
       }
     }
 
-    if (Object.keys(ovmInput.sources).length === 0) return {}
+    if (Object.keys(ovmInput.sources).length === 0) {
+      return {}
+    }
 
     // Build both inputs separately.
     const ovmOutput = await hre.run(TASK_COMPILE_SOLIDITY_RUN_SOLCJS, {
diff --git a/tslint.base.json b/tslint.base.json
index 350b4196a46ac..28bab7f8245b3 100644
--- a/tslint.base.json
+++ b/tslint.base.json
@@ -27,7 +27,8 @@
         "variable-name": false,
         "no-focused-test": true,
         "array-type": false,
-        "prettier": [true, "./.prettierrc.json"]
+        "prettier": [true, "./.prettierrc.json"],
+        "curly": true
     },
     "linterOptions": {
         "exclude": [