diff --git a/cmds/installd/tests/installd_cache_test.cpp b/cmds/installd/tests/installd_cache_test.cpp
index db09070..5a5cb53 100644
--- a/cmds/installd/tests/installd_cache_test.cpp
+++ b/cmds/installd/tests/installd_cache_test.cpp
@@ -67,29 +67,29 @@
 }
 
 static void mkdir(const char* path) {
-    const char* fullPath = StringPrintf("/data/local/tmp/user/0/%s", path).c_str();
-    ::mkdir(fullPath, 0755);
+    const std::string fullPath = StringPrintf("/data/local/tmp/user/0/%s", path);
+    ::mkdir(fullPath.c_str(), 0755);
 }
 
 static void touch(const char* path, int len, int time) {
-    const char* fullPath = StringPrintf("/data/local/tmp/user/0/%s", path).c_str();
-    int fd = ::open(fullPath, O_RDWR | O_CREAT, 0644);
+    const std::string fullPath = StringPrintf("/data/local/tmp/user/0/%s", path);
+    int fd = ::open(fullPath.c_str(), O_RDWR | O_CREAT, 0644);
     ::fallocate(fd, 0, 0, len);
     ::close(fd);
     struct utimbuf times;
     times.actime = times.modtime = std::time(0) + time;
-    ::utime(fullPath, &times);
+    ::utime(fullPath.c_str(), &times);
 }
 
 static int exists(const char* path) {
-    const char* fullPath = StringPrintf("/data/local/tmp/user/0/%s", path).c_str();
-    return ::access(fullPath, F_OK);
+    const std::string fullPath = StringPrintf("/data/local/tmp/user/0/%s", path);
+    return ::access(fullPath.c_str(), F_OK);
 }
 
 static int64_t size(const char* path) {
-    const char* fullPath = StringPrintf("/data/local/tmp/user/0/%s", path).c_str();
+    const std::string fullPath = StringPrintf("/data/local/tmp/user/0/%s", path);
     struct stat buf;
-    if (!stat(fullPath, &buf)) {
+    if (!stat(fullPath.c_str(), &buf)) {
         return buf.st_size;
     } else {
         return -1;
@@ -107,8 +107,8 @@
 }
 
 static void setxattr(const char* path, const char* key) {
-    const char* fullPath = StringPrintf("/data/local/tmp/user/0/%s", path).c_str();
-    ::setxattr(fullPath, key, "", 0, 0);
+    const std::string fullPath = StringPrintf("/data/local/tmp/user/0/%s", path);
+    ::setxattr(fullPath.c_str(), key, "", 0, 0);
 }
 
 class CacheTest : public testing::Test {