diff --git a/package-lock.json b/package-lock.json
index 3ed43bb..7b75e79 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -222,6 +222,11 @@
         "supports-color": "5.4.0"
       }
     },
+    "mock-fs": {
+      "version": "4.7.0",
+      "resolved": "https://registry.npmjs.org/mock-fs/-/mock-fs-4.7.0.tgz",
+      "integrity": "sha512-WlQNtUlzMRpvLHf8dqeUmNqfdPjGY29KrJF50Ldb4AcL+vQeR8QH3wQcFMgrhTwb1gHjZn9xggho+84tBskLgA=="
+    },
     "ms": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
diff --git a/package.json b/package.json
index 116a4a9..e648dbf 100644
--- a/package.json
+++ b/package.json
@@ -34,5 +34,8 @@
   "devDependencies": {
     "assert-diff": "2.0.3",
     "mocha": "5.2.0"
+  },
+  "dependencies": {
+    "mock-fs": "^4.7.0"
   }
 }
diff --git a/test.js b/test.js
index 0e2ae89..06ff280 100644
--- a/test.js
+++ b/test.js
@@ -1,5 +1,6 @@
 var yesql = require('./yesql.js')
 var assert = require('assert-diff')
+var mockFs = require('mock-fs');
 
 it('pg', function() {
   assert.deepEqual(
@@ -52,3 +53,16 @@ it('raw from file', function() {
   var sql = yesql('./')
   assert.equal(sql.updatePokemon, '-- updatePokemon\nUPDATE pokemon SET price=:price;\n')
 })
+
+it('parses files from a directory without trailing slash', function() {
+  mockFs({
+    './sqls': {
+      'one.sql': '-- updatePokemon\nUPDATE pokemon SET price=$1;\n',
+      'two.sql': '-- updateTransformer\nUPDATE transformer SET price=$1;\n'
+    }
+  })
+
+  var sql = yesql('./sqls')
+
+  mockFs.restore()
+})
diff --git a/yesql.js b/yesql.js
index 945f2e1..5255c3f 100644
--- a/yesql.js
+++ b/yesql.js
@@ -1,27 +1,28 @@
 var fs = require('fs')
+var path = require('path')
 
 module.exports = function readSqlFiles(dir, options) {
-  var opts = options ? options : {pg: false}
-  return fs.readdirSync(dir).filter(function(file) {
-    return file.endsWith('.sql')
-  }).map(function(file) {
-    return {
-      name: file,
-      content: fs
-        .readFileSync(dir + file, 'utf8')
-        .replace(/\r\n/g, '\n')
-    }
-  }).reduce(function(acc, value) {
-    acc[value.name] = value.content
-    value.content.split('\n\n').forEach(function(sql) {
-      if (sql.startsWith('-- ')) {
-        var sqlName = sql.split('\n')[0].substring(2).trim()
-        acc[sqlName] = opts.type ? module.exports[opts.type](sql) : sql
+    var opts = options ? options : {pg: false}
+    return fs.readdirSync(dir).filter(function(file) {
+      return file.endsWith('.sql')
+    }).map(function(file) {
+      return {
+        name: file,
+        content: fs
+          .readFileSync(path.resolve(dir, file), 'utf8')
+          .replace(/\r\n/g, '\n')
       }
-    })
-    return acc
-  }, {})
-}
+    }).reduce(function(acc, value) {
+      acc[value.name] = value.content
+      value.content.split('\n\n').forEach(function(sql) {
+        if (sql.startsWith('-- ')) {
+          var sqlName = sql.split('\n')[0].substring(2).trim()
+          acc[sqlName] = opts.type ? module.exports[opts.type](sql) : sql
+        }
+      })
+      return acc
+    }, {})
+  }
 module.exports.pg = pg
 module.exports.mysql = mysql