diff --git a/coverage.el b/coverage.el
index 8d8ab59..4e83871 100644
--- a/coverage.el
+++ b/coverage.el
@@ -1,4 +1,4 @@
-;;; coverage.el --- Code coverage line highlighting
+;;; coverage.el --- Code coverage line highlighting -*-lexical-binding: t-*-
 
 ;; Copyright (C) 2016 Powershop NZ Ltd.
 
diff --git a/test/coverage-test.el b/test/coverage-test.el
index 89626be..98f0590 100644
--- a/test/coverage-test.el
+++ b/test/coverage-test.el
@@ -1,7 +1,8 @@
-;;; Package -- summary
+;;; Package -- summary -*-lexical-binding: t-*-
 ;;; Commentary:
 ;;; Code:
 (require 'ert)
+(require 'cl-lib)
 (require 'ert-expectations)
 (require 'coverage)
 (require 'el-mock)
@@ -15,11 +16,11 @@
 (defvar example-json)
 (setq example-json `((provider-1
 		      (coverage
-		       (/foo/bar\.rb . ,(coerce bar-results 'array)))
+		       (/foo/bar\.rb . ,(cl-coerce bar-results 'array)))
 		      (timestamp . 1234567890))
 		     (provider-2
 		      (coverage
-		       (/baz/qux/quux\.rb . ,(coerce quux-results 'array)))
+		       (/baz/qux/quux\.rb . ,(cl-coerce quux-results 'array)))
 		      (timestamp . 6789012345))))
 
 (expectations