diff --git a/tests/test_bigint.js b/tests/test_bigint.js
index a0d028c..b908c26 100644
--- a/tests/test_bigint.js
+++ b/tests/test_bigint.js
@@ -193,7 +193,7 @@ function calc_pi(prec) {
     const CHUD_B = 545140134n;
     const CHUD_C = 640320n;
     const CHUD_C3 = 10939058860032000n; /* C^3/24 */
-    const CHUD_BITS_PER_TERM = 47.11041313821584202247; /* log2(C/12)*3 */
+    const CHUD_BITS_PER_TERM = 47.11041313821584; /* log2(C/12)*3 */
 
     /* return [P, Q, G] */
     function chud_bs(a, b, need_G) {