diff --git a/src/locale/lv.js b/src/locale/lv.js
index b06bd65a..7f800961 100644
--- a/src/locale/lv.js
+++ b/src/locale/lv.js
@@ -17,6 +17,21 @@ const locale = {
     LL: 'YYYY. [gada] D. MMMM',
     LLL: 'YYYY. [gada] D. MMMM, HH:mm',
     LLLL: 'YYYY. [gada] D. MMMM, dddd, HH:mm'
+  },
+  relativeTime: {
+    future: 'pēc %s',
+    past: 'pirms %s',
+    s: 'dažām sekundēm',
+    m: 'minūtes',
+    mm: '%d minūtēm',
+    h: 'stundas',
+    hh: '%d stundām',
+    d: 'dienas',
+    dd: '%d dienām',
+    M: 'mēneša',
+    MM: '%d mēnešiem',
+    y: 'gada',
+    yy: '%d gadiem'
   }
 }
 
diff --git a/src/plugin/customParseFormat/index.js b/src/plugin/customParseFormat/index.js
index cc338b0d..940bb43a 100644
--- a/src/plugin/customParseFormat/index.js
+++ b/src/plugin/customParseFormat/index.js
@@ -133,7 +133,7 @@ function correctHours(time) {
 }
 
 function makeParser(format) {
-  format = u(format, locale.formats)
+  format = u(format, locale && locale.formats)
   const array = format.match(formattingTokens)
   const { length } = array
   for (let i = 0; i < length; i += 1) {
@@ -224,6 +224,8 @@ export default (o, C, d) => {
       if (isStrict && date !== this.format(format)) {
         this.$d = new Date('')
       }
+      // reset global locale to make parallel unit test
+      locale = undefined
     } else if (format instanceof Array) {
       const len = format.length
       for (let i = 1; i <= len; i += 1) {