diff --git a/ChangeLog b/ChangeLog
index 98c89a33a0..e495be541a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2012-03-15  Andreas Jaeger  <aj@suse.de>
+
+	[BZ #13658]
+	* math/libm-test.inc (cos_test): Add more test cases.
+	(sin_test): Likewise.
+	(sincos_test): Likewise.
+
 2012-03-15  Andreas Jaeger  <aj@suse.de>
 
 	[BZ #13837]
diff --git a/math/libm-test.inc b/math/libm-test.inc
index 0801ca62c5..0337b60d65 100644
--- a/math/libm-test.inc
+++ b/math/libm-test.inc
@@ -2115,6 +2115,8 @@ cos_test (void)
 #ifdef TEST_DOUBLE
   TEST_f_f (cos, 0.80190127184058835, 0.69534156199418473);
   TEST_f_f (cos, 1e22, 0.5232147853951389454975944733847);
+  TEST_f_f (cos, 0x1p65, 0.998886220660580136106421721793);
+  TEST_f_f (cos, -0x1p65, 0.998886220660580136106421721793);
   TEST_f_f (cos, 0x1p1023, -0.8263698346141479945007856808117);
 #endif
 
@@ -6393,6 +6395,8 @@ sin_test (void)
   TEST_f_f (sin, 0.80190127184058835, 0.71867942238767868);
   TEST_f_f (sin, 2.522464e-1, 2.4957989804940911e-1);
   TEST_f_f (sin, 1e22, -0.8522008497671888017727058937530);
+  TEST_f_f (sin, 0x1p65, -0.0471838762123546738051061498057);
+  TEST_f_f (sin, -0x1p65, 0.0471838762123546738051061498057);
   TEST_f_f (sin, 0x1p1023, 0.5631277798508840248814522055909);
 #endif
 
@@ -6566,6 +6570,8 @@ sincos_test (void)
 #ifdef TEST_DOUBLE
   TEST_extra (sincos, 0.80190127184058835, 0.71867942238767868, 0.69534156199418473);
   TEST_extra (sincos, 1e22, -0.8522008497671888017727058937530, 0.5232147853951389454975944733847);
+  TEST_extra (sincos, 0x1p65, -0.0471838762123546738051061498057, 0.998886220660580136106421721793);
+  TEST_extra (sincos, -0x1p65, 0.0471838762123546738051061498057, 0.998886220660580136106421721793);
   TEST_extra (sincos, 0x1p1023, 0.5631277798508840248814522055909, -0.8263698346141479945007856808117);
 #endif