diff --git a/src/packet_io/dumpfile_io.cpp b/src/packet_io/dumpfile_io.cpp
index f10d798..8c55ed1 100644
--- a/src/packet_io/dumpfile_io.cpp
+++ b/src/packet_io/dumpfile_io.cpp
@@ -19,6 +19,7 @@
 struct dumpfile_io
 {
     uint16_t nr_threads;
+    char work_dir[256];
     char directory[256];
 
     pcap_t *pcap;
@@ -68,7 +69,7 @@ struct pcap_file_hdr DEFAULT_PCAP_FILE_HDR =
  * Private API
  ******************************************************************************/
 
-static void save_packet(struct packet *pkt, uint64_t idx)
+static void save_packet(const char *work_dir, struct packet *pkt, uint64_t idx)
 {
     int len = 0;
     FILE *fp = NULL;
@@ -94,7 +95,7 @@ static void save_packet(struct packet *pkt, uint64_t idx)
         inet_ntop(AF_INET6, &tuple.src_addr.v6, src_addr, INET6_ADDRSTRLEN);
         inet_ntop(AF_INET6, &tuple.dst_addr.v6, dst_addr, INET6_ADDRSTRLEN);
     }
-    snprintf(file, sizeof(file), "/tmp/inject-%s:%u-%s:%u-%lu.pcap", src_addr, ntohs(tuple.src_port), dst_addr, ntohs(tuple.dst_port), idx);
+    snprintf(file, sizeof(file), "%s/inject-%s:%u-%s:%u-%lu.pcap", work_dir, src_addr, ntohs(tuple.src_port), dst_addr, ntohs(tuple.dst_port), idx);
 
     fp = fopen(file, "w+");
     if (fp)
@@ -297,6 +298,11 @@ struct dumpfile_io *dumpfile_io_new(const char *directory, uint16_t nr_threads)
         PACKET_IO_LOG_ERROR("unable to allocate memory for dumpfile_io");
         return NULL;
     }
+    if (getcwd(handle->work_dir, sizeof(handle->work_dir)) == NULL)
+    {
+        PACKET_IO_LOG_ERROR("unable to get current work directory");
+        goto error_out;
+    }
 
     handle->nr_threads = nr_threads;
     strncpy(handle->directory, directory, MIN(strlen(directory), sizeof(handle->directory)));
@@ -468,7 +474,7 @@ int dumpfile_io_inject(struct dumpfile_io *handle, uint16_t thr_idx, struct pack
         stat->dev_tx_pkts++;
         stat->dev_tx_bytes += len;
 
-        save_packet(pkt, stat->inject_pkts);
+        save_packet(handle->work_dir, pkt, stat->inject_pkts);
 
         packet_free(pkt);
     }
diff --git a/test/gtest_inject_tcp_rst.cpp b/test/gtest_inject_tcp_rst.cpp
index 267645c..f3f2561 100644
--- a/test/gtest_inject_tcp_rst.cpp
+++ b/test/gtest_inject_tcp_rst.cpp
@@ -2,18 +2,24 @@
 
 #include "packet_injector_test_frame.h"
 
+static char current_dir[1024] = {0};
+
 #if 1
 TEST(INJECT_IPV4_BASED_TCP_RST, AFTER_RECV_SYN_ACK)
 {
+    char work_dir[2048] = {0};
+    char input_dir[2048] = {0};
+    snprintf(work_dir, sizeof(work_dir), "%s/%s", current_dir, "inject_ipv4_based_tcp_rst_after_recv_syn_ack");
+    snprintf(input_dir, sizeof(input_dir), "%s/%s", current_dir, "pcap/inject_ipv4_based_tcp_rst_after_recv_syn_ack/test/");
+
     struct packet_injector_case test = {
         // descriptor
-        .finish_clean_work_dir = 1,
+        .finish_clean_work_dir = 0,
         .descriptor = "Inject IPv4 based TCP RST after receiving SYN-ACK packet.",
-        .work_dir = "/tmp/inject_ipv4_based_tcp_rst_after_recv_syn_ack/", // user defined work directory
+        .work_dir = work_dir,
 
         // prefix
-        .input_prefix = "pcap/inject_ipv4_based_tcp_rst_after_recv_syn_ack/test/",
-        .output_prefix = "/tmp/",
+        .input_prefix = input_dir,
 
         // input pcap
         .input_pcap = "input.pcap",
@@ -37,15 +43,19 @@ TEST(INJECT_IPV4_BASED_TCP_RST, AFTER_RECV_SYN_ACK)
 #if 1
 TEST(INJECT_IPV4_BASED_TCP_RST, AFTER_RECV_SUB_ACK)
 {
+    char work_dir[2048] = {0};
+    char input_dir[2048] = {0};
+    snprintf(work_dir, sizeof(work_dir), "%s/%s", current_dir, "inject_ipv4_based_tcp_rst_after_recv_sub_ack");
+    snprintf(input_dir, sizeof(input_dir), "%s/%s", current_dir, "pcap/inject_ipv4_based_tcp_rst_after_recv_sub_ack/test/");
+
     struct packet_injector_case test = {
         // descriptor
-        .finish_clean_work_dir = 1,
+        .finish_clean_work_dir = 0,
         .descriptor = "Inject IPv4 based TCP RST after receiving SUB-ACK packet.",
-        .work_dir = "/tmp/inject_ipv4_based_tcp_rst_after_recv_sub_ack/", // user defined work directory
+        .work_dir = work_dir,
 
         // prefix
-        .input_prefix = "pcap/inject_ipv4_based_tcp_rst_after_recv_sub_ack/test/",
-        .output_prefix = "/tmp/",
+        .input_prefix = input_dir,
 
         // input pcap
         .input_pcap = "input.pcap",
@@ -69,15 +79,19 @@ TEST(INJECT_IPV4_BASED_TCP_RST, AFTER_RECV_SUB_ACK)
 #if 1
 TEST(INJECT_IPV4_BASED_TCP_RST, AFTER_RECV_C2S_FIRST_PAYLOAD)
 {
+    char work_dir[2048] = {0};
+    char input_dir[2048] = {0};
+    snprintf(work_dir, sizeof(work_dir), "%s/%s", current_dir, "inject_ipv4_based_tcp_rst_after_recv_c2s_first_payload");
+    snprintf(input_dir, sizeof(input_dir), "%s/%s", current_dir, "pcap/inject_ipv4_based_tcp_rst_after_recv_c2s_first_payload/test/");
+
     struct packet_injector_case test = {
         // descriptor
-        .finish_clean_work_dir = 1,
+        .finish_clean_work_dir = 0,
         .descriptor = "Inject IPv4 based TCP RST after receiving C2S first payload packet.",
-        .work_dir = "/tmp/inject_ipv4_based_tcp_rst_after_recv_c2s_first_payload/", // user defined work directory
+        .work_dir = work_dir,
 
         // prefix
-        .input_prefix = "pcap/inject_ipv4_based_tcp_rst_after_recv_c2s_first_payload/test/",
-        .output_prefix = "/tmp/",
+        .input_prefix = input_dir,
 
         // input pcap
         .input_pcap = "input.pcap",
@@ -101,15 +115,19 @@ TEST(INJECT_IPV4_BASED_TCP_RST, AFTER_RECV_C2S_FIRST_PAYLOAD)
 #if 1
 TEST(INJECT_IPV4_BASED_TCP_RST, AFTER_RECV_S2C_FIRST_PAYLOAD)
 {
+    char work_dir[2048] = {0};
+    char input_dir[2048] = {0};
+    snprintf(work_dir, sizeof(work_dir), "%s/%s", current_dir, "inject_ipv4_based_tcp_rst_after_recv_s2c_first_payload");
+    snprintf(input_dir, sizeof(input_dir), "%s/%s", current_dir, "pcap/inject_ipv4_based_tcp_rst_after_recv_s2c_first_payload/test/");
+
     struct packet_injector_case test = {
         // descriptor
-        .finish_clean_work_dir = 1,
+        .finish_clean_work_dir = 0,
         .descriptor = "Inject IPv4 based TCP RST after receiving S2C first payload packet.",
-        .work_dir = "/tmp/inject_ipv4_based_tcp_rst_after_recv_s2c_first_payload/", // user defined work directory
+        .work_dir = work_dir,
 
         // prefix
-        .input_prefix = "pcap/inject_ipv4_based_tcp_rst_after_recv_s2c_first_payload/test/",
-        .output_prefix = "/tmp/",
+        .input_prefix = input_dir,
 
         // input pcap
         .input_pcap = "input.pcap",
@@ -132,6 +150,7 @@ TEST(INJECT_IPV4_BASED_TCP_RST, AFTER_RECV_S2C_FIRST_PAYLOAD)
 
 int main(int argc, char **argv)
 {
+    getcwd(current_dir, sizeof(current_dir));
     ::testing::InitGoogleTest(&argc, argv);
     return RUN_ALL_TESTS();
 }
diff --git a/test/packet_injector_test_frame.cpp b/test/packet_injector_test_frame.cpp
index 09b1c32..b26e945 100644
--- a/test/packet_injector_test_frame.cpp
+++ b/test/packet_injector_test_frame.cpp
@@ -181,7 +181,7 @@ void packet_injector_test_frame_run(struct packet_injector_case *test)
     // compare pcap
     if (test->c2s_output_pcap && test->c2s_expect_pcap)
     {
-        system_cmd("mv %s/%s %s", test->output_prefix, test->c2s_output_pcap, output_dir_abs_path);
+        system_cmd("mv %s/%s %s", test->work_dir, test->c2s_output_pcap, output_dir_abs_path);
         expect_cmp_inject(test->work_dir,
                           expect_dir_abs_path, test->c2s_expect_pcap,
                           output_dir_abs_path, test->c2s_output_pcap,
@@ -189,7 +189,7 @@ void packet_injector_test_frame_run(struct packet_injector_case *test)
     }
     if (test->s2c_output_pcap && test->s2c_expect_pcap)
     {
-        system_cmd("mv %s/%s %s", test->output_prefix, test->s2c_output_pcap, output_dir_abs_path);
+        system_cmd("mv %s/%s %s", test->work_dir, test->s2c_output_pcap, output_dir_abs_path);
         expect_cmp_inject(test->work_dir,
                           expect_dir_abs_path, test->s2c_expect_pcap,
                           output_dir_abs_path, test->s2c_output_pcap,
diff --git a/test/packet_injector_test_frame.h b/test/packet_injector_test_frame.h
index ade3f30..beb977e 100644
--- a/test/packet_injector_test_frame.h
+++ b/test/packet_injector_test_frame.h
@@ -15,7 +15,6 @@ struct packet_injector_case
 
     // prefix
     const char *input_prefix;
-    const char *output_prefix;
 
     // input pcap
     const char *input_pcap;