diff --git a/jest.config.js b/jest.config.js
index 5961124..a88be9e 100644
--- a/jest.config.js
+++ b/jest.config.js
@@ -1,4 +1,5 @@
 module.exports = {
+  setupFilesAfterEnv: ['<rootDir>/src/tests/setup.js'],
   moduleDirectories: ['node_modules', 'src'],
   snapshotSerializers: [],
   moduleNameMapper: {
diff --git a/src/tests/setup.js b/src/tests/setup.js
new file mode 100644
index 0000000..43a7f3b
--- /dev/null
+++ b/src/tests/setup.js
@@ -0,0 +1,5 @@
+const nodeCrypto = require('crypto');
+
+window.crypto = {
+  getRandomValues: buffer => nodeCrypto.randomFillSync(buffer),
+};