diff --git a/tests/src/test_certs.h b/tests/src/test_certs.h
index b313ea8..856d899 100644
--- a/tests/src/test_certs.h
+++ b/tests/src/test_certs.h
@@ -8,8 +8,8 @@
 /* THIS FILE is generated by `tests/scripts/generate_test_cert_macros.py` */
 /* *INDENT-OFF* */
 
-/* This is taken from test-ca2.crt. */
-/* BEGIN FILE string macro TEST_CA_CRT_EC_PEM test-ca2.crt */
+/* This is taken from data_files/test-ca2.crt. */
+/* BEGIN FILE string macro TEST_CA_CRT_EC_PEM data_files/test-ca2.crt */
 #define TEST_CA_CRT_EC_PEM                                                     \
     "-----BEGIN CERTIFICATE-----\r\n"                                          \
     "MIICBzCCAYugAwIBAgIJAMFD4n5iQ8zoMAwGCCqGSM49BAMCBQAwPjELMAkGA1UE\r\n"     \
@@ -26,8 +26,8 @@
     "-----END CERTIFICATE-----\r\n"
 /* END FILE */
 
-/* This is generated from test-ca2.crt.der. */
-/* BEGIN FILE binary macro TEST_CA_CRT_EC_DER test-ca2.crt.der */
+/* This is generated from data_files/test-ca2.crt.der. */
+/* BEGIN FILE binary macro TEST_CA_CRT_EC_DER data_files/test-ca2.crt.der */
 #define TEST_CA_CRT_EC_DER {                                                    \
         0x30, 0x82, 0x02, 0x07, 0x30, 0x82, 0x01, 0x8b, 0xa0, 0x03, 0x02, 0x01, \
         0x02, 0x02, 0x09, 0x00, 0xc1, 0x43, 0xe2, 0x7e, 0x62, 0x43, 0xcc, 0xe8, \
@@ -76,8 +76,8 @@
 }
 /* END FILE */
 
-/* This is taken from test-ca2.key.enc. */
-/* BEGIN FILE string macro TEST_CA_KEY_EC_PEM test-ca2.key.enc */
+/* This is taken from data_files/test-ca2.key.enc. */
+/* BEGIN FILE string macro TEST_CA_KEY_EC_PEM data_files/test-ca2.key.enc */
 #define TEST_CA_KEY_EC_PEM                                                     \
     "-----BEGIN EC PRIVATE KEY-----\r\n"                                       \
     "Proc-Type: 4,ENCRYPTED\r\n"                                               \
@@ -92,8 +92,8 @@
 
 #define TEST_CA_PWD_EC_PEM "PolarSSLTest"
 
-/* This is generated from test-ca2.key.der. */
-/* BEGIN FILE binary macro TEST_CA_KEY_EC_DER test-ca2.key.der */
+/* This is generated from data_files/test-ca2.key.der. */
+/* BEGIN FILE binary macro TEST_CA_KEY_EC_DER data_files/test-ca2.key.der */
 #define TEST_CA_KEY_EC_DER {                                                    \
         0x30, 0x81, 0xa4, 0x02, 0x01, 0x01, 0x04, 0x30, 0x83, 0xd9, 0x15, 0x0e, \
         0xa0, 0x71, 0xf0, 0x57, 0x10, 0x33, 0xa3, 0x38, 0xb8, 0x86, 0xc1, 0xa6, \
@@ -112,8 +112,8 @@
 }
 /* END FILE */
 
-/* This is taken from test-ca-sha256.crt. */
-/* BEGIN FILE string macro TEST_CA_CRT_RSA_SHA256_PEM test-ca-sha256.crt */
+/* This is taken from data_files/test-ca-sha256.crt. */
+/* BEGIN FILE string macro TEST_CA_CRT_RSA_SHA256_PEM data_files/test-ca-sha256.crt */
 #define TEST_CA_CRT_RSA_SHA256_PEM                                             \
     "-----BEGIN CERTIFICATE-----\r\n"                                          \
     "MIIDQTCCAimgAwIBAgIBAzANBgkqhkiG9w0BAQsFADA7MQswCQYDVQQGEwJOTDER\r\n"     \
@@ -137,8 +137,8 @@
     "-----END CERTIFICATE-----\r\n"
 /* END FILE */
 
-/* This is generated from test-ca-sha256.crt.der. */
-/* BEGIN FILE binary macro TEST_CA_CRT_RSA_SHA256_DER test-ca-sha256.crt.der */
+/* This is generated from data_files/test-ca-sha256.crt.der. */
+/* BEGIN FILE binary macro TEST_CA_CRT_RSA_SHA256_DER data_files/test-ca-sha256.crt.der */
 #define TEST_CA_CRT_RSA_SHA256_DER {                                            \
         0x30, 0x82, 0x03, 0x41, 0x30, 0x82, 0x02, 0x29, 0xa0, 0x03, 0x02, 0x01, \
         0x02, 0x02, 0x01, 0x03, 0x30, 0x0d, 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86, \
@@ -213,8 +213,8 @@
 }
 /* END FILE */
 
-/* This is taken from test-ca-sha1.crt. */
-/* BEGIN FILE string macro TEST_CA_CRT_RSA_SHA1_PEM test-ca-sha1.crt */
+/* This is taken from data_files/test-ca-sha1.crt. */
+/* BEGIN FILE string macro TEST_CA_CRT_RSA_SHA1_PEM data_files/test-ca-sha1.crt */
 #define TEST_CA_CRT_RSA_SHA1_PEM                                               \
     "-----BEGIN CERTIFICATE-----\r\n"                                          \
     "MIIDQTCCAimgAwIBAgIBAzANBgkqhkiG9w0BAQUFADA7MQswCQYDVQQGEwJOTDER\r\n"     \
@@ -238,8 +238,8 @@
     "-----END CERTIFICATE-----\r\n"
 /* END FILE */
 
-/* This is generated from test-ca-sha1.crt.der. */
-/* BEGIN FILE binary macro TEST_CA_CRT_RSA_SHA1_DER test-ca-sha1.crt.der */
+/* This is generated from data_files/test-ca-sha1.crt.der. */
+/* BEGIN FILE binary macro TEST_CA_CRT_RSA_SHA1_DER data_files/test-ca-sha1.crt.der */
 #define TEST_CA_CRT_RSA_SHA1_DER {                                              \
         0x30, 0x82, 0x03, 0x41, 0x30, 0x82, 0x02, 0x29, 0xa0, 0x03, 0x02, 0x01, \
         0x02, 0x02, 0x01, 0x03, 0x30, 0x0d, 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86, \
@@ -314,8 +314,8 @@
 }
 /* END FILE */
 
-/* This is taken from test-ca.key. */
-/* BEGIN FILE string macro TEST_CA_KEY_RSA_PEM test-ca.key */
+/* This is taken from data_files/test-ca.key. */
+/* BEGIN FILE string macro TEST_CA_KEY_RSA_PEM data_files/test-ca.key */
 #define TEST_CA_KEY_RSA_PEM                                                    \
     "-----BEGIN RSA PRIVATE KEY-----\r\n"                                      \
     "Proc-Type: 4,ENCRYPTED\r\n"                                               \
@@ -351,8 +351,8 @@
 
 #define TEST_CA_PWD_RSA_PEM "PolarSSLTest"
 
-/* This is generated from test-ca.key.der. */
-/* BEGIN FILE binary macro TEST_CA_KEY_RSA_DER test-ca.key.der */
+/* This is generated from data_files/test-ca.key.der. */
+/* BEGIN FILE binary macro TEST_CA_KEY_RSA_DER data_files/test-ca.key.der */
 #define TEST_CA_KEY_RSA_DER {                                                   \
         0x30, 0x82, 0x04, 0xa4, 0x02, 0x01, 0x00, 0x02, 0x82, 0x01, 0x01, 0x00, \
         0xc0, 0xdf, 0x37, 0xfc, 0x17, 0xbb, 0xe0, 0x96, 0x9d, 0x3f, 0x86, 0xde, \
@@ -457,8 +457,8 @@
 }
 /* END FILE */
 
-/* This is taken from server5.crt. */
-/* BEGIN FILE string macro TEST_SRV_CRT_EC_PEM server5.crt */
+/* This is taken from data_files/server5.crt. */
+/* BEGIN FILE string macro TEST_SRV_CRT_EC_PEM data_files/server5.crt */
 #define TEST_SRV_CRT_EC_PEM                                                    \
     "-----BEGIN CERTIFICATE-----\r\n"                                          \
     "MIICIDCCAaWgAwIBAgIBCTAKBggqhkjOPQQDAjA+MQswCQYDVQQGEwJOTDERMA8G\r\n"     \
@@ -476,8 +476,8 @@
     "-----END CERTIFICATE-----\r\n"
 /* END FILE */
 
-/* This is generated from server5.crt.der. */
-/* BEGIN FILE binary macro TEST_SRV_CRT_EC_DER server5.crt.der */
+/* This is generated from data_files/server5.crt.der. */
+/* BEGIN FILE binary macro TEST_SRV_CRT_EC_DER data_files/server5.crt.der */
 #define TEST_SRV_CRT_EC_DER {                                                   \
         0x30, 0x82, 0x02, 0x20, 0x30, 0x82, 0x01, 0xa5, 0xa0, 0x03, 0x02, 0x01, \
         0x02, 0x02, 0x01, 0x09, 0x30, 0x0a, 0x06, 0x08, 0x2a, 0x86, 0x48, 0xce, \
@@ -528,8 +528,8 @@
 }
 /* END FILE */
 
-/* This is taken from server5.key. */
-/* BEGIN FILE string macro TEST_SRV_KEY_EC_PEM server5.key */
+/* This is taken from data_files/server5.key. */
+/* BEGIN FILE string macro TEST_SRV_KEY_EC_PEM data_files/server5.key */
 #define TEST_SRV_KEY_EC_PEM                                                    \
     "-----BEGIN EC PRIVATE KEY-----\r\n"                                       \
     "MHcCAQEEIPEqEyB2AnCoPL/9U/YDHvdqXYbIogTywwyp6/UfDw6noAoGCCqGSM49\r\n"     \
@@ -538,8 +538,8 @@
     "-----END EC PRIVATE KEY-----\r\n"
 /* END FILE */
 
-/* This is generated from server5.key.der. */
-/* BEGIN FILE binary macro TEST_SRV_KEY_EC_DER server5.key.der */
+/* This is generated from data_files/server5.key.der. */
+/* BEGIN FILE binary macro TEST_SRV_KEY_EC_DER data_files/server5.key.der */
 #define TEST_SRV_KEY_EC_DER {                                                   \
         0x30, 0x77, 0x02, 0x01, 0x01, 0x04, 0x20, 0xf1, 0x2a, 0x13, 0x20, 0x76, \
         0x02, 0x70, 0xa8, 0x3c, 0xbf, 0xfd, 0x53, 0xf6, 0x03, 0x1e, 0xf7, 0x6a, \
@@ -555,8 +555,8 @@
 }
 /* END FILE */
 
-/* This is taken from server2-sha256.crt. */
-/* BEGIN FILE string macro TEST_SRV_CRT_RSA_SHA256_PEM server2-sha256.crt */
+/* This is taken from data_files/server2-sha256.crt. */
+/* BEGIN FILE string macro TEST_SRV_CRT_RSA_SHA256_PEM data_files/server2-sha256.crt */
 #define TEST_SRV_CRT_RSA_SHA256_PEM                                            \
     "-----BEGIN CERTIFICATE-----\r\n"                                          \
     "MIIDNzCCAh+gAwIBAgIBAjANBgkqhkiG9w0BAQsFADA7MQswCQYDVQQGEwJOTDER\r\n"     \
@@ -580,8 +580,8 @@
     "-----END CERTIFICATE-----\r\n"
 /* END FILE */
 
-/* This is generated from server2-sha256.crt.der. */
-/* BEGIN FILE binary macro TEST_SRV_CRT_RSA_SHA256_DER server2-sha256.crt.der */
+/* This is generated from data_files/server2-sha256.crt.der. */
+/* BEGIN FILE binary macro TEST_SRV_CRT_RSA_SHA256_DER data_files/server2-sha256.crt.der */
 #define TEST_SRV_CRT_RSA_SHA256_DER {                                           \
         0x30, 0x82, 0x03, 0x37, 0x30, 0x82, 0x02, 0x1f, 0xa0, 0x03, 0x02, 0x01, \
         0x02, 0x02, 0x01, 0x02, 0x30, 0x0d, 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86, \
@@ -655,8 +655,8 @@
 }
 /* END FILE */
 
-/* This is taken from server2.crt. */
-/* BEGIN FILE string macro TEST_SRV_CRT_RSA_SHA1_PEM server2.crt */
+/* This is taken from data_files/server2.crt. */
+/* BEGIN FILE string macro TEST_SRV_CRT_RSA_SHA1_PEM data_files/server2.crt */
 #define TEST_SRV_CRT_RSA_SHA1_PEM                                              \
     "-----BEGIN CERTIFICATE-----\r\n"                                          \
     "MIIDNzCCAh+gAwIBAgIBAjANBgkqhkiG9w0BAQUFADA7MQswCQYDVQQGEwJOTDER\r\n"     \
@@ -680,8 +680,8 @@
     "-----END CERTIFICATE-----\r\n"
 /* END FILE */
 
-/* This is generated from server2.crt.der. */
-/* BEGIN FILE binary macro TEST_SRV_CRT_RSA_SHA1_DER server2.crt.der */
+/* This is generated from data_files/server2.crt.der. */
+/* BEGIN FILE binary macro TEST_SRV_CRT_RSA_SHA1_DER data_files/server2.crt.der */
 #define TEST_SRV_CRT_RSA_SHA1_DER {                                             \
         0x30, 0x82, 0x03, 0x37, 0x30, 0x82, 0x02, 0x1f, 0xa0, 0x03, 0x02, 0x01, \
         0x02, 0x02, 0x01, 0x02, 0x30, 0x0d, 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86, \
@@ -755,8 +755,8 @@
 }
 /* END FILE */
 
-/* This is taken from server2.key. */
-/* BEGIN FILE string macro TEST_SRV_KEY_RSA_PEM server2.key */
+/* This is taken from data_files/server2.key. */
+/* BEGIN FILE string macro TEST_SRV_KEY_RSA_PEM data_files/server2.key */
 #define TEST_SRV_KEY_RSA_PEM                                                   \
     "-----BEGIN RSA PRIVATE KEY-----\r\n"                                      \
     "MIIEpAIBAAKCAQEAwU2j3efNHdEE10lyuJmsDnjkOjxKzzoTFtBa5M2jAIin7h5r\r\n"     \
@@ -787,8 +787,8 @@
     "-----END RSA PRIVATE KEY-----\r\n"
 /* END FILE */
 
-/* This is generated from server2.key.der. */
-/* BEGIN FILE binary macro TEST_SRV_KEY_RSA_DER server2.key.der */
+/* This is generated from data_files/server2.key.der. */
+/* BEGIN FILE binary macro TEST_SRV_KEY_RSA_DER data_files/server2.key.der */
 #define TEST_SRV_KEY_RSA_DER {                                                  \
         0x30, 0x82, 0x04, 0xa4, 0x02, 0x01, 0x00, 0x02, 0x82, 0x01, 0x01, 0x00, \
         0xc1, 0x4d, 0xa3, 0xdd, 0xe7, 0xcd, 0x1d, 0xd1, 0x04, 0xd7, 0x49, 0x72, \
@@ -893,8 +893,8 @@
 }
 /* END FILE */
 
-/* This is taken from cli2.crt. */
-/* BEGIN FILE string macro TEST_CLI_CRT_EC_PEM cli2.crt */
+/* This is taken from data_files/cli2.crt. */
+/* BEGIN FILE string macro TEST_CLI_CRT_EC_PEM data_files/cli2.crt */
 #define TEST_CLI_CRT_EC_PEM                                                    \
     "-----BEGIN CERTIFICATE-----\r\n"                                          \
     "MIIB3zCCAWOgAwIBAgIBDTAMBggqhkjOPQQDAgUAMD4xCzAJBgNVBAYTAk5MMREw\r\n"     \
@@ -911,8 +911,8 @@
     "-----END CERTIFICATE-----\r\n"
 /* END FILE */
 
-/* This is generated from cli2.crt.der. */
-/* BEGIN FILE binary macro TEST_CLI_CRT_EC_DER cli2.crt.der */
+/* This is generated from data_files/cli2.crt.der. */
+/* BEGIN FILE binary macro TEST_CLI_CRT_EC_DER data_files/cli2.crt.der */
 #define TEST_CLI_CRT_EC_DER {                                                   \
         0x30, 0x82, 0x01, 0xdf, 0x30, 0x82, 0x01, 0x63, 0xa0, 0x03, 0x02, 0x01, \
         0x02, 0x02, 0x01, 0x0d, 0x30, 0x0c, 0x06, 0x08, 0x2a, 0x86, 0x48, 0xce, \
@@ -958,8 +958,8 @@
 }
 /* END FILE */
 
-/* This is taken from cli2.key. */
-/* BEGIN FILE string macro TEST_CLI_KEY_EC_PEM cli2.key */
+/* This is taken from data_files/cli2.key. */
+/* BEGIN FILE string macro TEST_CLI_KEY_EC_PEM data_files/cli2.key */
 #define TEST_CLI_KEY_EC_PEM                                                    \
     "-----BEGIN EC PRIVATE KEY-----\r\n"                                       \
     "MHcCAQEEIPb3hmTxZ3/mZI3vyk7p3U3wBf+WIop6hDhkFzJhmLcqoAoGCCqGSM49\r\n"     \
@@ -968,8 +968,8 @@
     "-----END EC PRIVATE KEY-----\r\n"
 /* END FILE */
 
-/* This is generated from cli2.key.der. */
-/* BEGIN FILE binary macro TEST_CLI_KEY_EC_DER cli2.key.der */
+/* This is generated from data_files/cli2.key.der. */
+/* BEGIN FILE binary macro TEST_CLI_KEY_EC_DER data_files/cli2.key.der */
 #define TEST_CLI_KEY_EC_DER {                                                   \
         0x30, 0x77, 0x02, 0x01, 0x01, 0x04, 0x20, 0xf6, 0xf7, 0x86, 0x64, 0xf1, \
         0x67, 0x7f, 0xe6, 0x64, 0x8d, 0xef, 0xca, 0x4e, 0xe9, 0xdd, 0x4d, 0xf0, \
@@ -985,8 +985,8 @@
 }
 /* END FILE */
 
-/* This is taken from cli-rsa-sha256.crt. */
-/* BEGIN FILE string macro TEST_CLI_CRT_RSA_PEM cli-rsa-sha256.crt */
+/* This is taken from data_files/cli-rsa-sha256.crt. */
+/* BEGIN FILE string macro TEST_CLI_CRT_RSA_PEM data_files/cli-rsa-sha256.crt */
 #define TEST_CLI_CRT_RSA_PEM                                                   \
     "-----BEGIN CERTIFICATE-----\r\n"                                          \
     "MIIDPzCCAiegAwIBAgIBBDANBgkqhkiG9w0BAQsFADA7MQswCQYDVQQGEwJOTDER\r\n"     \
@@ -1010,8 +1010,8 @@
     "-----END CERTIFICATE-----\r\n"
 /* END FILE */
 
-/* This is generated from cli-rsa-sha256.crt.der. */
-/* BEGIN FILE binary macro TEST_CLI_CRT_RSA_DER cli-rsa-sha256.crt.der */
+/* This is generated from data_files/cli-rsa-sha256.crt.der. */
+/* BEGIN FILE binary macro TEST_CLI_CRT_RSA_DER data_files/cli-rsa-sha256.crt.der */
 #define TEST_CLI_CRT_RSA_DER {                                                  \
         0x30, 0x82, 0x03, 0x3f, 0x30, 0x82, 0x02, 0x27, 0xa0, 0x03, 0x02, 0x01, \
         0x02, 0x02, 0x01, 0x04, 0x30, 0x0d, 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86, \
@@ -1086,8 +1086,8 @@
 }
 /* END FILE */
 
-/* This is taken from cli-rsa.key. */
-/* BEGIN FILE string macro TEST_CLI_KEY_RSA_PEM cli-rsa.key */
+/* This is taken from data_files/cli-rsa.key. */
+/* BEGIN FILE string macro TEST_CLI_KEY_RSA_PEM data_files/cli-rsa.key */
 #define TEST_CLI_KEY_RSA_PEM                                                   \
     "-----BEGIN RSA PRIVATE KEY-----\r\n"                                      \
     "MIIEpAIBAAKCAQEAyHTEzLn5tXnpRdkUYLB9u5Pyax6fM60Nj4o8VmXl3ETZzGaF\r\n"     \
@@ -1118,8 +1118,8 @@
     "-----END RSA PRIVATE KEY-----\r\n"
 /* END FILE */
 
-/* This is generated from cli-rsa.key.der. */
-/* BEGIN FILE binary macro TEST_CLI_KEY_RSA_DER cli-rsa.key.der */
+/* This is generated from data_files/cli-rsa.key.der. */
+/* BEGIN FILE binary macro TEST_CLI_KEY_RSA_DER data_files/cli-rsa.key.der */
 #define TEST_CLI_KEY_RSA_DER {                                                  \
         0x30, 0x82, 0x04, 0xa4, 0x02, 0x01, 0x00, 0x02, 0x82, 0x01, 0x01, 0x00, \
         0xc8, 0x74, 0xc4, 0xcc, 0xb9, 0xf9, 0xb5, 0x79, 0xe9, 0x45, 0xd9, 0x14, \