diff --git a/libc/test/src/__support/File/CMakeLists.txt b/libc/test/src/__support/File/CMakeLists.txt
index a11f52978f35f..57c37aa7dd220 100644
--- a/libc/test/src/__support/File/CMakeLists.txt
+++ b/libc/test/src/__support/File/CMakeLists.txt
@@ -5,8 +5,16 @@ if(NOT (TARGET libc.src.__support.threads.mutex) OR LIBC_TARGET_OS_IS_GPU)
   return()
 endif()
 
+# TODO: Investigate the precommit bots' failures of this test and re-enable it.
+# https://github.com/llvm/llvm-project/issues/128185.
+set(file_test_unit_only "")
+if(LIBC_TARGET_OS_IS_LINUX AND LLVM_LIBC_FULL_BUILD)
+  set(file_test_unit_only "UNIT_TEST_ONLY")
+endif()
+
 add_libc_test(
   file_test
+  ${file_test_unit_only}
   SUITE
     libc-support-tests
   SRCS
@@ -23,6 +31,7 @@ add_libc_test(
 
 add_libc_test(
   platform_file_test
+  ${file_test_unit_only}
   SUITE
     libc-support-tests
   SRCS
diff --git a/libc/test/src/__support/File/file_test.cpp b/libc/test/src/__support/File/file_test.cpp
index b3c9f2ba49bce..cf01a78ef6423 100644
--- a/libc/test/src/__support/File/file_test.cpp
+++ b/libc/test/src/__support/File/file_test.cpp
@@ -113,6 +113,9 @@ StringFile *new_string_file(char *buffer, size_t buflen, int bufmode,
                              LIBC_NAMESPACE::File::mode_flags(mode));
 }
 
+// TODO: Investigate the precommit bots' failures of this test and re-enable it.
+// https://github.com/llvm/llvm-project/issues/128185.
+#if 0
 TEST(LlvmLibcFileTest, WriteOnly) {
   const char data[] = "hello, file";
   constexpr size_t FILE_BUFFER_SIZE = sizeof(data) * 3 / 2;
@@ -150,6 +153,7 @@ TEST(LlvmLibcFileTest, WriteOnly) {
 
   ASSERT_EQ(f->close(), 0);
 }
+#endif
 
 TEST(LlvmLibcFileTest, WriteLineBuffered) {
   const char data[] = "hello\n file";
diff --git a/libc/test/src/__support/File/platform_file_test.cpp b/libc/test/src/__support/File/platform_file_test.cpp
index 6b2be2a149329..b232544317b18 100644
--- a/libc/test/src/__support/File/platform_file_test.cpp
+++ b/libc/test/src/__support/File/platform_file_test.cpp
@@ -20,6 +20,9 @@ LIBC_INLINE File *openfile(const char *file_name, const char *mode) {
   return error_or_file.has_value() ? error_or_file.value() : nullptr;
 }
 
+// TODO: Investigate the precommit bots' failures of this test and re-enable it.
+// https://github.com/llvm/llvm-project/issues/128185.
+#if 0
 TEST(LlvmLibcPlatformFileTest, CreateWriteCloseAndReadBack) {
   constexpr char FILENAME[] = "testdata/create_write_close_and_readback.test";
   File *file = openfile(FILENAME, "w");
@@ -40,6 +43,7 @@ TEST(LlvmLibcPlatformFileTest, CreateWriteCloseAndReadBack) {
 
   ASSERT_EQ(file->close(), 0);
 }
+#endif
 
 TEST(LlvmLibcPlatformFileTest, CreateWriteSeekAndReadBack) {
   constexpr char FILENAME[] = "testdata/create_write_seek_and_readback.test";