diff --git a/libc/test/src/stdlib/CMakeLists.txt b/libc/test/src/stdlib/CMakeLists.txt
index 0eb373c3fa061..42e8faa3fd69f 100644
--- a/libc/test/src/stdlib/CMakeLists.txt
+++ b/libc/test/src/stdlib/CMakeLists.txt
@@ -187,6 +187,7 @@ add_header_library(
   DEPENDS
     libc.src.__support.CPP.type_traits
     libc.src.__support.FPUtil.fp_bits
+    libc.src.__support.macros.properties.architectures
 )
 
 add_libc_test(
diff --git a/libc/test/src/stdlib/StrfromTest.h b/libc/test/src/stdlib/StrfromTest.h
index fd2e0f120e90e..3dacfca9e89f9 100644
--- a/libc/test/src/stdlib/StrfromTest.h
+++ b/libc/test/src/stdlib/StrfromTest.h
@@ -8,6 +8,7 @@
 
 #include "src/__support/CPP/type_traits.h"
 #include "src/__support/FPUtil/FPBits.h"
+#include "src/__support/macros/properties/architectures.h"
 #include "test/UnitTest/ErrnoCheckingTest.h"
 #include "test/UnitTest/ErrnoSetterMatcher.h"
 #include "test/UnitTest/Test.h"
@@ -484,7 +485,9 @@ class StrfromTest : public LIBC_NAMESPACE::testing::ErrnoCheckingTest {
     ASSERT_STREQ_LEN(written, buff, "-NAN");
   }
 
+  // https://github.com/llvm/llvm-project/issues/166795
   void charsWrittenOverflow(FunctionT func) {
+#ifndef LIBC_TARGET_ARCH_IS_RISCV32
     char buff[100];
     // Trigger an overflow in the return value of strfrom by writing more than
     // INT_MAX bytes.
@@ -492,6 +495,7 @@ class StrfromTest : public LIBC_NAMESPACE::testing::ErrnoCheckingTest {
 
     EXPECT_LT(result, 0);
     ASSERT_ERRNO_FAILURE();
+#endif
   }
 };