diff --git a/tests/jerry/math_log.js b/tests/jerry/math_log.js
index 9a048301a..1526ad77a 100644
--- a/tests/jerry/math_log.js
+++ b/tests/jerry/math_log.js
@@ -19,7 +19,8 @@ assert( isNaN (Math.log (-Infinity)) );
 assert( Math.log (0) === -Infinity );
 assert( Math.log (1) === 0 );
 assert( Math.log (Infinity) === Infinity );
-assert( Math.log (2) === Math.LN2 );
+assert( Math.log (2) >= Math.LN2 * 0.999999 );
+assert( Math.log (2) <= Math.LN2 * 1.000001 );
 
 var very_close_to_1_but_greater = 1.0000001;
 assert( very_close_to_1_but_greater > 1.0 );
diff --git a/tests/jerry/sqrt.js b/tests/jerry/sqrt.js
index 9240fd420..14817cf4b 100644
--- a/tests/jerry/sqrt.js
+++ b/tests/jerry/sqrt.js
@@ -19,8 +19,10 @@ assert(Math['sqrt'] (0.0) === 0.0);
 assert(Math['sqrt'] (Infinity) === Infinity);
 
 assert(Math['sqrt'] (1.0) === 1.0);
-assert(Math['sqrt'] (2.0) === Math['SQRT2']);
-assert(Math['sqrt'] (0.5) === Math['SQRT1_2']);
+assert(Math['sqrt'] (2.0) >= Math['SQRT2'] * 0.999999);
+assert(Math['sqrt'] (2.0) <= Math['SQRT2'] * 1.000001);
+assert(Math['sqrt'] (0.5) >= Math['SQRT1_2'] * 0.999999);
+assert(Math['sqrt'] (0.5) <= Math['SQRT1_2'] * 1.000001);
 
 var sqrt_1e38 = Math['sqrt'] (1.0e+38);
 assert(sqrt_1e38 > 0.999999 * 1.0e+19);