diff --git a/app/test/test_cryptodev.c b/app/test/test_cryptodev.c
index 35fe16aaa..ac575c8a3 100644
--- a/app/test/test_cryptodev.c
+++ b/app/test/test_cryptodev.c
@@ -7215,6 +7215,18 @@ test_pdcp_proto_cplane_encap(int i)
 		pdcp_test_data_in_len[i]+4);
 }
 
+int
+test_pdcp_proto_cplane_decap(int i)
+{
+	return test_pdcp_proto(i, 0,
+		RTE_CRYPTO_CIPHER_OP_DECRYPT,
+		RTE_CRYPTO_AUTH_OP_VERIFY,
+		pdcp_test_data_out[i],
+		pdcp_test_data_in_len[i] + 4,
+		pdcp_test_data_in[i],
+		pdcp_test_data_in_len[i]);
+}
+
 #endif
 
 static int
@@ -11632,6 +11644,9 @@ static struct unit_test_suite cryptodev_dpaa_sec_testsuite  = {
 #ifdef RTE_LIBRTE_SECURITY
 		TEST_CASE_ST(ut_setup, ut_teardown,
 			test_PDCP_PROTO_cplane_encap_all),
+
+		TEST_CASE_ST(ut_setup, ut_teardown,
+			test_PDCP_PROTO_cplane_decap_all),
 #endif
 		/** AES GCM Authenticated Encryption */
 		TEST_CASE_ST(ut_setup, ut_teardown,
@@ -11741,6 +11756,9 @@ static struct unit_test_suite cryptodev_dpaa2_sec_testsuite  = {
 #ifdef RTE_LIBRTE_SECURITY
 		TEST_CASE_ST(ut_setup, ut_teardown,
 			test_PDCP_PROTO_cplane_encap_all),
+
+		TEST_CASE_ST(ut_setup, ut_teardown,
+			test_PDCP_PROTO_cplane_decap_all),
 #endif
 		/** AES GCM Authenticated Encryption */
 		TEST_CASE_ST(ut_setup, ut_teardown,
diff --git a/app/test/test_cryptodev_security_pdcp.c b/app/test/test_cryptodev_security_pdcp.c
index cdf6639b7..803fc1dfc 100644
--- a/app/test/test_cryptodev_security_pdcp.c
+++ b/app/test/test_cryptodev_security_pdcp.c
@@ -48,6 +48,31 @@ static int cplane_encap(uint32_t sn_size, uint8_t dir,
 	return test_pdcp_proto_cplane_encap(i);
 }
 
+static int
+cplane_decap(uint32_t sn_size, uint8_t dir,
+	     enum enc_alg_off enc_alg_off,
+	     enum auth_alg_off auth_alg_off)
+{
+	int i = 0;
+
+	switch (sn_size) {
+	case 5:
+		i = PDCP_CPLANE_OFFSET + enc_alg_off +
+			auth_alg_off + ((dir == 0) ?
+				UPLINK : DOWNLINK);
+		break;
+	case 12:
+		i = PDCP_CPLANE_LONG_SN_OFFSET + enc_alg_off +
+			auth_alg_off + ((dir == 0) ?
+				UPLINK : DOWNLINK);
+		break;
+	default:
+		printf("\nInvalid SN: %u for %s\n", sn_size, __func__);
+	}
+
+	return test_pdcp_proto_cplane_decap(i);
+}
+
 #define TEST_PDCP_COUNT(func) do {			\
 	if (func == TEST_SUCCESS)  {			\
 		printf("\t%d)", n++);			\
@@ -138,3 +163,83 @@ test_PDCP_PROTO_cplane_encap_all(void)
 
 	return n - i;
 };
+
+int
+test_PDCP_PROTO_cplane_decap_all(void)
+{
+	int i = 0, n = 0;
+
+	TEST_PDCP_COUNT(cplane_decap(5, UPLINK, NULL_ENC, NULL_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(5, DOWNLINK, NULL_ENC, NULL_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(5, UPLINK, NULL_ENC, SNOW_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(5, DOWNLINK, NULL_ENC, SNOW_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(5, UPLINK, NULL_ENC, AES_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(5, DOWNLINK, NULL_ENC, AES_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(5, UPLINK, NULL_ENC, ZUC_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(5, DOWNLINK, NULL_ENC, ZUC_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(5, UPLINK, SNOW_ENC, NULL_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(5, DOWNLINK, SNOW_ENC, NULL_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(5, UPLINK, SNOW_ENC, SNOW_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(5, DOWNLINK, SNOW_ENC, SNOW_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(5, UPLINK, SNOW_ENC, AES_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(5, DOWNLINK, SNOW_ENC, AES_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(5, UPLINK, SNOW_ENC, ZUC_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(5, DOWNLINK, SNOW_ENC, ZUC_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(5, UPLINK, AES_ENC, NULL_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(5, DOWNLINK, AES_ENC, NULL_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(5, UPLINK, AES_ENC, SNOW_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(5, DOWNLINK, AES_ENC, SNOW_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(5, UPLINK, AES_ENC, AES_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(5, DOWNLINK, AES_ENC, AES_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(5, UPLINK, AES_ENC, ZUC_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(5, DOWNLINK, AES_ENC, ZUC_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(5, UPLINK, ZUC_ENC, NULL_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(5, DOWNLINK, ZUC_ENC, NULL_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(5, UPLINK, ZUC_ENC, SNOW_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(5, DOWNLINK, ZUC_ENC, SNOW_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(5, UPLINK, ZUC_ENC, AES_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(5, DOWNLINK, ZUC_ENC, AES_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(5, UPLINK, ZUC_ENC, ZUC_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(5, DOWNLINK, ZUC_ENC, ZUC_AUTH));
+
+	/* C-plane 12-bit */
+	TEST_PDCP_COUNT(cplane_decap(12, UPLINK, NULL_ENC, NULL_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(12, DOWNLINK, NULL_ENC, NULL_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(12, UPLINK, NULL_ENC, SNOW_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(12, DOWNLINK, NULL_ENC, SNOW_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(12, UPLINK, NULL_ENC, AES_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(12, DOWNLINK, NULL_ENC, AES_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(12, UPLINK, NULL_ENC, ZUC_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(12, DOWNLINK, NULL_ENC, ZUC_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(12, UPLINK, SNOW_ENC, NULL_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(12, DOWNLINK, SNOW_ENC, NULL_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(12, UPLINK, SNOW_ENC, SNOW_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(12, DOWNLINK, SNOW_ENC, SNOW_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(12, UPLINK, SNOW_ENC, AES_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(12, DOWNLINK, SNOW_ENC, AES_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(12, UPLINK, SNOW_ENC, ZUC_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(12, DOWNLINK, SNOW_ENC, ZUC_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(12, UPLINK, AES_ENC, NULL_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(12, DOWNLINK, AES_ENC, NULL_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(12, UPLINK, AES_ENC, SNOW_AUTH));
+
+	TEST_PDCP_COUNT(cplane_decap(12, DOWNLINK, AES_ENC, SNOW_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(12, UPLINK, AES_ENC, AES_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(12, DOWNLINK, AES_ENC, AES_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(12, UPLINK, AES_ENC, ZUC_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(12, DOWNLINK, AES_ENC, ZUC_AUTH));
+
+	TEST_PDCP_COUNT(cplane_decap(12, UPLINK, ZUC_ENC, NULL_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(12, DOWNLINK, ZUC_ENC, NULL_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(12, UPLINK, ZUC_ENC, SNOW_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(12, DOWNLINK, ZUC_ENC, SNOW_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(12, UPLINK, ZUC_ENC, AES_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(12, DOWNLINK, ZUC_ENC, AES_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(12, UPLINK, ZUC_ENC, ZUC_AUTH));
+	TEST_PDCP_COUNT(cplane_decap(12, DOWNLINK, ZUC_ENC, ZUC_AUTH));
+
+	if (n - i)
+		printf("## %s: %d passed out of %d\n", __func__, i, n);
+
+	return n - i;
+};
diff --git a/app/test/test_cryptodev_security_pdcp_test_func.h b/app/test/test_cryptodev_security_pdcp_test_func.h
index ad1e7c70a..21a6e8a48 100644
--- a/app/test/test_cryptodev_security_pdcp_test_func.h
+++ b/app/test/test_cryptodev_security_pdcp_test_func.h
@@ -30,7 +30,9 @@ enum auth_alg_off {
 };
 
 int test_pdcp_proto_cplane_encap(int i);
+int test_pdcp_proto_cplane_decap(int i);
 
 int test_PDCP_PROTO_cplane_encap_all(void);
+int test_PDCP_PROTO_cplane_decap_all(void);
 
 #endif /* SECURITY_PDCP_TEST_FUNC_H_ */
