diff --git a/package.json b/package.json
index a6282d84..aadd99f0 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,7 @@
   "scripts": {
     "build": "webpack",
     "clean": "rm -rf build",
-    "test": "npm run build",
+    "test": "npm run build && jest --silent",
     "update-buildsystem": "rm -rf src/node_modules; npm run clean"
   },
   "jest": {
diff --git a/src/mod.test.ts b/src/mod.test.ts
index 5eb0139f..95ad1f2a 100644
--- a/src/mod.test.ts
+++ b/src/mod.test.ts
@@ -43,7 +43,7 @@ for (let [a, b, ans] of testcases) {
 
 
 /** Test with mixed dividend, positive divisor */
-for (let i=0; i<1000; i++) {
+for (let i=0; i<100; i++) {
     let a = (Math.random()-0.5) * 10000|0
     let b = Math.random() * 10000|0
     b = b === 0 ? 17 : b // Don't be 0.
@@ -55,7 +55,7 @@ for (let i=0; i<1000; i++) {
 }
 
 /** Test with a mix of +ve and -ve */
-for (let i=0; i<1000; i++) {
+for (let i=0; i<100; i++) {
     let a = (Math.random()-0.5) * 10000|0
     let b = (Math.random()-0.5) * 10000|0
     b = b === 0 ? 17 : b // Don't be 0.