diff --git a/be/test/runtime/user_function_cache_test.cpp b/be/test/runtime/user_function_cache_test.cpp
index 970ffe786c..201e8cbc2e 100644
--- a/be/test/runtime/user_function_cache_test.cpp
+++ b/be/test/runtime/user_function_cache_test.cpp
@@ -96,7 +96,7 @@ public:
         hostname = "http://127.0.0.1:" + std::to_string(real_port);
 
         // compile code to so
-        system("g++ -shared ./be/test/runtime/test_data/user_function_cache/lib/my_add.cc -o "
+        system("g++ -shared -fPIC ./be/test/runtime/test_data/user_function_cache/lib/my_add.cc -o "
                "./be/test/runtime/test_data/user_function_cache/lib/my_add.so");
 
         my_add_md5sum =
diff --git a/be/test/util/filesystem_util_test.cpp b/be/test/util/filesystem_util_test.cpp
index f445d443f0..acafebc9a1 100644
--- a/be/test/util/filesystem_util_test.cpp
+++ b/be/test/util/filesystem_util_test.cpp
@@ -35,8 +35,9 @@ TEST(FileSystemUtil, rlimit) {
 }
 
 TEST(FileSystemUtil, CreateDirectory) {
+    char filename[] = "temp-XXXXXX";
     // Setup a temporary directory with one subdir
-    std::string dir_name = std::tmpnam(nullptr);
+    std::string dir_name = mkdtemp(filename);
     path dir{dir_name};
     path subdir1 = dir / "path1";
     path subdir2 = dir / "path2";
diff --git a/be/test/util/threadpool_test.cpp b/be/test/util/threadpool_test.cpp
index d17026356b..f9866a77f7 100644
--- a/be/test/util/threadpool_test.cpp
+++ b/be/test/util/threadpool_test.cpp
@@ -314,6 +314,7 @@ TEST_F(ThreadPoolTest, TestZeroQueueSize) {
 // deadlocks, so we'll disable the entire test instead.
 #ifndef THREAD_SANITIZER
 TEST_F(ThreadPoolTest, TestDeadlocks) {
+    ::testing::FLAGS_gtest_death_test_style = "threadsafe";
     const char* death_msg = "called pool function that would result in deadlock";
     ASSERT_DEATH(
             {