diff --git a/test_conformance/math_brute_force/function_list.cpp b/test_conformance/math_brute_force/function_list.cpp
index 408a394afa..d9249ee415 100644
--- a/test_conformance/math_brute_force/function_list.cpp
+++ b/test_conformance/math_brute_force/function_list.cpp
@@ -426,6 +426,7 @@ const Func functionList[] = {
     // basic operations
     OPERATOR_ENTRY(add, "+", 0.0f, 0.0f, 0.0f, 0.0f, FTZ_OFF, binaryOperatorF),
     OPERATOR_ENTRY(subtract, "-", 0.0f, 0.0f, 0.0f, 0.0f, FTZ_OFF, binaryOperatorF),
+    OPERATOR_ENTRY(negation, "-", 0.0f, 0.0f, 0.0f, 0.0f, FTZ_OFF, unaryOF),
     { "reciprocal",
       "reciprocal",
       { (void*)reference_reciprocal },
diff --git a/test_conformance/math_brute_force/main.cpp b/test_conformance/math_brute_force/main.cpp
index a395488cd5..d4c388866c 100644
--- a/test_conformance/math_brute_force/main.cpp
+++ b/test_conformance/math_brute_force/main.cpp
@@ -359,6 +359,7 @@ DO_TEST(half_sqrt)
 DO_TEST(half_tan)
 DO_TEST(add)
 DO_TEST(subtract)
+DO_TEST(negation)
 DO_TEST(reciprocal)
 DO_TEST(divide)
 DO_TEST(divide_cr)
diff --git a/test_conformance/math_brute_force/reference_math.cpp b/test_conformance/math_brute_force/reference_math.cpp
index a66e6f7e55..8742bc7077 100644
--- a/test_conformance/math_brute_force/reference_math.cpp
+++ b/test_conformance/math_brute_force/reference_math.cpp
@@ -962,6 +962,8 @@ double reference_subtract(double x, double y)
     return a;
 }
 
+double reference_negation(double v) { return -v; }
+
 double reference_multiply(double x, double y)
 {
     volatile float a = (float)x;
@@ -3207,6 +3209,8 @@ long double reference_subtractl(long double x, long double y)
     return (long double)a;
 }
 
+long double reference_negationl(long double v) { return -v; }
+
 long double reference_multiplyl(long double x, long double y)
 {
     volatile double a = (double)x;
diff --git a/test_conformance/math_brute_force/reference_math.h b/test_conformance/math_brute_force/reference_math.h
index b740787ff5..7e64a5acf2 100644
--- a/test_conformance/math_brute_force/reference_math.h
+++ b/test_conformance/math_brute_force/reference_math.h
@@ -64,6 +64,7 @@ double reference_modf(double, double* n);
 double reference_fdim(double, double);
 double reference_add(double, double);
 double reference_subtract(double, double);
+double reference_negation(double v);
 double reference_divide(double, double);
 double reference_multiply(double, double);
 double reference_remquo(double, double, int*);
@@ -183,6 +184,7 @@ long double reference_modfl(long double, long double* n);
 long double reference_fdiml(long double, long double);
 long double reference_addl(long double, long double);
 long double reference_subtractl(long double, long double);
+long double reference_negationl(long double);
 long double reference_dividel(long double, long double);
 long double reference_multiplyl(long double, long double);
 long double reference_remquol(long double, long double, int*);