diff --git a/libc/test/UnitTest/HermeticTestUtils.cpp b/libc/test/UnitTest/HermeticTestUtils.cpp
index 73d54b9eeb5ecc..68e31f478d79ab 100644
--- a/libc/test/UnitTest/HermeticTestUtils.cpp
+++ b/libc/test/UnitTest/HermeticTestUtils.cpp
@@ -104,6 +104,10 @@ void *__dso_handle = nullptr;
 
 } // extern "C"
 
+void *operator new(size_t size) { return malloc(size); }
+
+void *operator new[](size_t size) { return malloc(size); }
+
 void operator delete(void *) {
   // The libc runtime should not use the global delete operator. Hence,
   // we just trap here to catch any such accidental usages.
diff --git a/libc/test/src/math/smoke/CMakeLists.txt b/libc/test/src/math/smoke/CMakeLists.txt
index 65dc80c2a882a5..87b72e2a8eca2e 100644
--- a/libc/test/src/math/smoke/CMakeLists.txt
+++ b/libc/test/src/math/smoke/CMakeLists.txt
@@ -1214,6 +1214,9 @@ add_fp_unittest(
     libc.include.signal
     libc.src.math.nanf
     libc.src.__support.FPUtil.fp_bits
+  # FIXME: The nan tests currently have death tests, which aren't supported for
+  # hermetic tests.
+  UNIT_TEST_ONLY
 )
 
 add_fp_unittest(
@@ -1227,6 +1230,9 @@ add_fp_unittest(
     libc.include.signal
     libc.src.math.nan
     libc.src.__support.FPUtil.fp_bits
+  # FIXME: The nan tests currently have death tests, which aren't supported for
+  # hermetic tests.
+  UNIT_TEST_ONLY
 )
 
 add_fp_unittest(
@@ -1240,6 +1246,9 @@ add_fp_unittest(
     libc.include.signal
     libc.src.math.nanl
     libc.src.__support.FPUtil.fp_bits
+  # FIXME: The nan tests currently have death tests, which aren't supported for
+  # hermetic tests.
+  UNIT_TEST_ONLY
 )
 
 # FIXME: These tests are currently spurious for NVPTX.