diff --git a/test/staging/sm/Math/acosh-approx.js b/test/staging/sm/Math/acosh-approx.js
index 502a4e4975..6af46bf582 100644
--- a/test/staging/sm/Math/acosh-approx.js
+++ b/test/staging/sm/Math/acosh-approx.js
@@ -273,7 +273,7 @@ var cosh_data = [
     [1875817529344, 28.953212876533797]
 ];
 
-var sloppy_tolerance = 8;  // FIXME
+var sloppy_tolerance = 9;  // FIXME
 
 for (var [x, y] of cosh_data)
     assertNear(Math.acosh(x), y, sloppy_tolerance);
diff --git a/test/staging/sm/Math/cbrt-approx.js b/test/staging/sm/Math/cbrt-approx.js
index c5123f1210..02095245df 100644
--- a/test/staging/sm/Math/cbrt-approx.js
+++ b/test/staging/sm/Math/cbrt-approx.js
@@ -22,6 +22,8 @@ var cbrt_data = [
     [ Math.SQRT2, 1.1224620483093728 ]
 ];
 
-for (var [x, y] of cbrt_data)
-    assertNear(Math.cbrt(x), y);
+var sloppy_tolerance = 3;
+
+for (var [x, y] of cbrt_data)
+    assertNear(Math.cbrt(x), y, sloppy_tolerance);