diff --git a/tests/stdio_test.cpp b/tests/stdio_test.cpp
index 87031f6..5bc6567 100644
--- a/tests/stdio_test.cpp
+++ b/tests/stdio_test.cpp
@@ -25,6 +25,7 @@
 #include <sys/cdefs.h>
 #include <sys/socket.h>
 #include <sys/stat.h>
+#include <sys/sysinfo.h>
 #include <sys/types.h>
 #include <unistd.h>
 #include <wchar.h>
@@ -2938,3 +2939,27 @@
 
   fclose(fp);
 }
+
+static int64_t GetTotalRamGiB() {
+  struct sysinfo si;
+  sysinfo(&si);
+  return (static_cast<int64_t>(si.totalram) * si.mem_unit) / 1024 / 1024 / 1024;
+}
+
+TEST(STDIO_TEST, fread_int_overflow) {
+  if (GetTotalRamGiB() <= 4) GTEST_SKIP() << "not enough memory";
+
+  const size_t too_big_for_an_int = 0x80000000ULL;
+  std::vector<char> buf(too_big_for_an_int);
+  std::unique_ptr<FILE, decltype(&fclose)> fp{fopen("/dev/zero", "re"), fclose};
+  ASSERT_EQ(too_big_for_an_int, fread(&buf[0], 1, too_big_for_an_int, fp.get()));
+}
+
+TEST(STDIO_TEST, fwrite_int_overflow) {
+  if (GetTotalRamGiB() <= 4) GTEST_SKIP() << "not enough memory";
+
+  const size_t too_big_for_an_int = 0x80000000ULL;
+  std::vector<char> buf(too_big_for_an_int);
+  std::unique_ptr<FILE, decltype(&fclose)> fp{fopen("/dev/null", "we"), fclose};
+  ASSERT_EQ(too_big_for_an_int, fwrite(&buf[0], 1, too_big_for_an_int, fp.get()));
+}