diff --git a/tests/rand-distrib.ispc b/tests/rand-distrib.ispc
index 8188a01c..9fe32753 100644
--- a/tests/rand-distrib.ispc
+++ b/tests/rand-distrib.ispc
@@ -5,7 +5,7 @@ export void f_f(uniform float RET[], uniform float aFOO[]) {
     RNGState state;
     seed_rng(state, 1);
     float sum = 0;
-    uniform int iters = 10000;
+    uniform int iters = 40000;
     for (unsigned int i = 0; i < iters; ++i)
         sum += frandom(state);
     float avg = sum / iters;