diff --git a/test/depr/depr.c.headers/math_h.pass.cpp b/test/depr/depr.c.headers/math_h.pass.cpp
index 9e93966f..858e1906 100644
--- a/test/depr/depr.c.headers/math_h.pass.cpp
+++ b/test/depr/depr.c.headers/math_h.pass.cpp
@@ -82,9 +82,9 @@ void test_exp()
 void test_fabs()
 {
     static_assert((std::is_same<decltype(fabs((double)0)), double>::value), "");
-    static_assert((std::is_same<decltype(fabsf(0)), float>::value), "");
-    static_assert((std::is_same<decltype(fabsl(0)), long double>::value), "");
-    assert(fabs(-1) == 1);
+    static_assert((std::is_same<decltype(fabsf(0.f)), float>::value), "");
+    static_assert((std::is_same<decltype(fabsl(0.L)), long double>::value), "");
+    assert(fabs(-1.f) == 1);
 }
 
 void test_floor()
diff --git a/test/numerics/complex.number/complex.transcendentals/atanh.pass.cpp b/test/numerics/complex.number/complex.transcendentals/atanh.pass.cpp
index 451fc160..b821109b 100644
--- a/test/numerics/complex.number/complex.transcendentals/atanh.pass.cpp
+++ b/test/numerics/complex.number/complex.transcendentals/atanh.pass.cpp
@@ -51,7 +51,7 @@ void test_edges()
             assert(std::signbit(x[i].real()) == std::signbit(r.real()));
             assert(std::isnan(r.imag()));
         }
-        else if (abs(x[i].real()) == 1 && x[i].imag() == 0)
+        else if (std::abs(x[i].real()) == 1 && x[i].imag() == 0)
         {
             assert(std::isinf(r.real()));
             assert(std::signbit(x[i].real()) == std::signbit(r.real()));