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-rw-r--r--math/libm-test.inc2
1 files changed, 2 insertions, 0 deletions
diff --git a/math/libm-test.inc b/math/libm-test.inc
index 729fce9369..b23ec8430f 100644
--- a/math/libm-test.inc
+++ b/math/libm-test.inc
@@ -2557,6 +2557,8 @@ fdim_test (void)
   TEST_ff_f (fdim, nan_value, minus_infty, nan_value);
   TEST_ff_f (fdim, nan_value, nan_value, nan_value);
 
+  TEST_ff_f (fdim, plus_infty, plus_infty, 0);
+
   END (fdim);
 }