openssl/test
Matt Caswell 22fbfe6a7d Fix safestack issues in srp.h
Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Paul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/12781)
2020-09-13 11:10:41 +01:00
..
certs apps: make use of OSSL_STORE for generalized certs and CRLs loading 2020-08-20 14:55:34 +02:00
ct Use .cnf for config files, not .conf 2020-03-06 18:25:13 +01:00
d2i-tests
ocsp-tests
ossl_shim Fix API rename issue in shim layer that calls EVP_MAC_CTX_set_params 2020-07-21 08:51:18 +10:00
recipes NonStop port updates for 3.0.0. 2020-09-12 20:32:11 +02:00
smime-certs Update copyright year 2020-08-06 13:22:30 +01:00
ssl-tests Test mte with stitched ciphersuites in TLSv1.0 2020-08-20 17:02:34 +01:00
testutil testutil: Add provider.c with test_get_libctx(), to use at least for SSL and CMP 2020-08-21 09:04:09 +02:00
aborttest.c
acvp_test.c Add EVP signature with libctx methods. 2020-08-09 17:34:52 +10:00
acvp_test.inc Add ACVP fips module tests 2020-06-17 11:33:16 +10:00
aesgcmtest.c Retire EVP_CTRL_GET_IV 2020-08-11 07:07:57 -07:00
afalgtest.c Update copyright year 2020-07-16 14:47:04 +02:00
asn1_decode_test.c Update source files for deprecation at 3.0 2019-11-07 11:37:25 +01:00
asn1_dsa_internal_test.c Reorganize private crypto header files 2019-09-28 20:26:34 +02:00
asn1_encode_test.c Update source files for deprecation at 3.0 2019-11-07 11:37:25 +01:00
asn1_internal_test.c Reorganize private crypto header files 2019-09-28 20:26:34 +02:00
asn1_string_table_test.c
asn1_time_test.c Update copyright year 2020-04-23 13:55:52 +01:00
asynciotest.c Update copyright year 2020-04-23 13:55:52 +01:00
asynctest.c Update copyright year 2020-07-16 14:47:04 +02:00
bad_dtls_test.c Revert "The EVP_MAC functions have been renamed for consistency. The EVP_MAC_CTX_*" 2020-07-16 14:21:07 +02:00
bftest.c Update copyright year 2020-04-23 13:55:52 +01:00
bio_callback_test.c
bio_enc_test.c
bio_memleak_test.c Update copyright year 2020-05-15 14:09:49 +01:00
bio_prefix_text.c TEST: Add test recipe and help program to test BIO_f_prefix() 2019-12-18 19:42:44 +01:00
bioprinttest.c TEST: Adjust test/bioprinttest.c to behave like the testutil routines 2020-06-06 19:18:30 +02:00
bn_internal_test.c Update copyright year 2020-05-15 14:09:49 +01:00
bn_rand_range.h
bntest.c NonStop port updates for 3.0.0. 2020-09-12 20:32:11 +02:00
bntests.pl
build.info TEST: Add a test of EC key generation with encoding spec 2020-09-12 20:24:52 +02:00
ca-and-certs.cnf Cleanup cert config files for tests 2020-06-03 09:56:56 +02:00
casttest.c Update copyright year 2020-04-23 13:55:52 +01:00
CAtsa.cnf Remove RANDFILE settings from configuration files 2019-11-24 08:35:14 +01:00
chacha_internal_test.c Reorganize private crypto header files 2019-09-28 20:26:34 +02:00
cipher_overhead_test.c Reorganize local header files 2019-09-28 20:26:35 +02:00
cipherbytes_test.c Fix safestack issues in ssl.h 2020-09-13 11:09:45 +01:00
cipherlist_test.c Fix safestack issues in ssl.h 2020-09-13 11:09:45 +01:00
ciphername_test.c Fix safestack issues in ssl.h 2020-09-13 11:09:45 +01:00
clienthellotest.c Update copyright year 2020-04-23 13:55:52 +01:00
cmactest.c Add a CMAC test 2020-06-10 12:58:26 +01:00
cmp_asn_test.c chunk 6 of CMP contribution to OpenSSL 2019-12-12 10:57:25 +00:00
cmp_client_test.c Fix safestack issues in cmp.h 2020-09-13 11:10:40 +01:00
cmp_ctx_test.c Fix safestack issues in cmp.h 2020-09-13 11:10:40 +01:00
cmp_hdr_test.c Fix safestack issues in cmp.h 2020-09-13 11:10:40 +01:00
cmp_msg_test.c Fix safestack issues in cmp.h 2020-09-13 11:10:40 +01:00
cmp_protect_test.c Fix safestack issues in x509.h 2020-09-13 11:09:45 +01:00
cmp_server_test.c Add libctx/provider support to cmp_server_test 2020-08-21 09:04:11 +02:00
cmp_status_test.c Fix safestack issues in asn1.h 2020-09-13 11:10:40 +01:00
cmp_testlib.c Fix safestack issues in x509.h 2020-09-13 11:09:45 +01:00
cmp_testlib.h TEST: Fix CMP tests so they load keys in the current library context 2020-08-24 18:20:29 +02:00
cmp_vfy_test.c OSSL_CMP_CTX: rename field and its getter/setter from 'untrusted_certs' to 'untrusted 2020-09-05 19:33:33 +02:00
cms-examples.pl
cmsapitest.c Fix safestack issues in x509.h 2020-09-13 11:09:45 +01:00
conf_include_test.c Remove RANDFILE settings from configuration files 2019-11-24 08:35:14 +01:00
confdump.c Fix stacks of OPENSSL_STRING, OPENSSL_CSTRING and OPENSSL_BLOCK 2020-09-13 11:10:39 +01:00
constant_time_test.c Reorganize local header files 2019-09-28 20:26:35 +02:00
context_internal_test.c
crltest.c Fix safestack issues in x509.h 2020-09-13 11:09:45 +01:00
ct_test.c testutil: Make SETUP_TEST_FIXTURE return 0 on fixture == NULL 2020-08-21 09:04:09 +02:00
ctype_internal_test.c Reorganize private crypto header files 2019-09-28 20:26:34 +02:00
curve448_internal_test.c Update copyright year 2020-04-23 13:55:52 +01:00
d2i_test.c Update copyright year 2020-04-23 13:55:52 +01:00
danetest.c Fix safestack issues in x509.h 2020-09-13 11:09:45 +01:00
danetest.in
danetest.pem
data2.txt Rename NOTES*, README*, VERSION, HACKING, LICENSE to .md or .txt 2020-07-05 11:29:43 +02:00
data.txt Rename NOTES*, README*, VERSION, HACKING, LICENSE to .md or .txt 2020-07-05 11:29:43 +02:00
default-and-fips.cnf Update some nits around the FIPS module 2020-04-24 13:19:16 +02:00
default-and-legacy.cnf
default.cnf
defltfips_test.c Test that EVP_default_properties_is_fips_enabled() works early 2020-08-17 11:27:51 +01:00
destest.c Update copyright year 2020-04-23 13:55:52 +01:00
dhtest.c Update copyright year 2020-04-23 13:55:52 +01:00
drbg_cavs_data.h Fix header file include guard names 2019-09-28 20:26:36 +02:00
drbg_extra_test.h Amend references to "OpenSSL license" 2020-04-29 15:27:22 +02:00
drbgtest.c NonStop port updates for 3.0.0. 2020-09-12 20:32:11 +02:00
drbgtest.h
dsa_no_digest_size_test.c Update copyright year 2020-04-23 13:55:52 +01:00
dsatest.c Make EVP_PKEY_CTX_[get|set]_group_name work for DH too 2020-06-19 10:19:31 +01:00
dtls_mtu_test.c Fix safestack issues in ssl.h 2020-09-13 11:09:45 +01:00
dtlstest.c Update copyright year 2020-04-23 13:55:52 +01:00
dtlsv1listentest.c
ec_internal_test.c Update copyright year 2020-04-23 13:55:52 +01:00
ecdsatest.c Rename FIPS_MODE to FIPS_MODULE 2020-04-28 15:37:37 +02:00
ecdsatest.h Fix header file include guard names 2019-09-28 20:26:36 +02:00
ecstresstest.c
ectest.c Add Explicit EC parameter support to providers. 2020-08-22 14:55:41 +10:00
endecode_test.c TEST: modify test/endecode_test.c to not use legacy keys 2020-09-08 16:45:12 +02:00
enginetest.c EVP: deprecate the EVP_X_meth_ functions. 2020-07-22 20:19:01 +10:00
errtest.c TEST: fix test/errtest.c 2020-07-05 21:13:25 +02:00
evp_extra_test2.c TEST: Add test to exercise OPENSSL_CTX_set0_default() 2020-06-28 10:55:51 +02:00
evp_extra_test.c TEST: Add a test of EC key generation with encoding spec 2020-09-12 20:24:52 +02:00
evp_fetch_prov_test.c EVP: deprecate the EVP_X_meth_ functions. 2020-07-22 20:19:01 +10:00
evp_kdf_test.c Revert "kdf: make function naming consistent." 2020-07-16 14:21:07 +02:00
evp_libctx_test.c Fix stacks of OPENSSL_STRING, OPENSSL_CSTRING and OPENSSL_BLOCK 2020-09-13 11:10:39 +01:00
evp_pkey_dparams_test.c
evp_pkey_provided_test.c Rename OSSL_SERIALIZER / OSSL_DESERIALIZER to OSSL_ENCODE / OSSL_DECODE 2020-08-21 09:23:58 +02:00
evp_test.c Fix stacks of OPENSSL_STRING, OPENSSL_CSTRING and OPENSSL_BLOCK 2020-09-13 11:10:39 +01:00
evp_test.h
exdatatest.c Update copyright year 2020-06-04 14:33:57 +01:00
exptest.c
fatalerrtest.c Update copyright year 2020-04-23 13:55:52 +01:00
ffc_internal_test.c Add multiple fixes for ffc key generation using invalid p,q,g parameters. 2020-07-09 13:43:10 +10:00
filterprov.c Make the naming scheme for dispatched functions more consistent 2020-06-24 22:01:22 +02:00
fips-and-base.cnf Add CLI tests in FIPS configuration 2020-08-24 14:49:03 +03:00
fips.cnf Test that EVP_default_properties_is_fips_enabled() works early 2020-08-17 11:27:51 +01:00
generate_buildtest.pl
generate_ssl_tests.pl Update copyright year 2020-04-23 13:55:52 +01:00
gmdifftest.c
gosttest.c Use a non-default libctx in sslapitest 2020-04-19 14:40:55 +01:00
handshake_helper.c Fix safestack issues in x509.h 2020-09-13 11:09:45 +01:00
handshake_helper.h Fix header file include guard names 2019-09-28 20:26:36 +02:00
hexstr_test.c Fix ERR_print_errors so that it matches the documented format in doc/man3/ERR_error_string.pod 2020-05-26 12:44:36 +10:00
hmactest.c Update copyright year 2020-04-23 13:55:52 +01:00
http_test.c OSSL_HTTP_parse_url(): add optional port number return parameter and strengthen documentation 2020-09-08 15:36:24 +02:00
ideatest.c Update copyright year 2020-04-23 13:55:52 +01:00
igetest.c Deprecate the AES_ige_*() functions 2019-12-04 17:46:38 +00:00
insta_ca.cert.pem Chunk 11 of CMP contribution to OpenSSL: CMP command-line interface 2020-05-13 19:42:00 +02:00
insta.priv.pem Chunk 11 of CMP contribution to OpenSSL: CMP command-line interface 2020-05-13 19:42:00 +02:00
keymgmt_internal_test.c Update copyright year 2020-04-23 13:55:52 +01:00
legacy.cnf
lhash_test.c
mdc2_internal_test.c Update copyright year 2020-04-23 13:55:52 +01:00
mdc2test.c Update copyright year 2020-04-23 13:55:52 +01:00
memleaktest.c test/memleaktest.c: Modify for use with address/leak sanitizer 2019-12-10 14:16:12 +01:00
modes_internal_test.c Update copyright year 2020-04-23 13:55:52 +01:00
namemap_internal_test.c namemap: change ossl_namemap_empty() to do what the documentation says. 2020-06-21 16:49:51 +10:00
ocspapitest.c Fix safestack issues in x509.h 2020-09-13 11:09:45 +01:00
ossl_store_test.c Fix coverity issue: CID 1466482 - Resource leak in OSSL_STORE_SEARCH_by_key_fingerprint() 2020-09-12 15:57:24 +10:00
p_test.c Make the naming scheme for dispatched functions more consistent 2020-06-24 22:01:22 +02:00
packettest.c
param_build_test.c params: add OSSL_PARAM helpers for time_t. 2020-06-24 20:05:41 +10:00
params_api_test.c Add and use internal header that implements endianness check 2020-07-11 10:00:33 +02:00
params_conversion_test.c Update copyright year 2020-04-23 13:55:52 +01:00
params_test.c Update copyright year 2020-04-23 13:55:52 +01:00
pbelutest.c
pemtest.c
pkcs7-1.pem
pkcs7.pem
pkcs12_format_test.c Add new APIs to get PKCS12 secretBag OID and value 2020-08-07 07:59:48 +10:00
pkcs12_helper.c Fix safestack issues in pkcs7.h 2020-09-13 11:10:41 +01:00
pkcs12_helper.h Add new APIs to get PKCS12 secretBag OID and value 2020-08-07 07:59:48 +10:00
pkey_meth_kdf_test.c Extend the EVP_PKEY KDF to KDF provider bridge to also support Scrypt 2020-08-10 14:51:59 +01:00
pkey_meth_test.c Update copyright year 2020-08-06 13:22:30 +01:00
pkits-test.pl
poly1305_internal_test.c Add ChaCha related ciphers to default provider 2019-10-16 16:18:42 +10:00
property_test.c Update copyright year 2020-05-15 14:09:49 +01:00
provider_fallback_test.c TEST: Add provider_fallback_test, to test aspects of fallback providers 2020-06-04 16:42:45 +02:00
provider_internal_test.c
provider_internal_test.cnf.in Use .cnf for config files, not .conf 2020-03-06 18:25:13 +01:00
provider_status_test.c Add 'on demand self test' and status test to providers 2020-08-09 18:06:52 +10:00
provider_test.c
proxy.cnf Cleanup cert config files for tests 2020-06-03 09:56:56 +02:00
rand_status_test.c rand: instantiate the DRBGs upon first use. 2020-08-28 10:19:56 +10:00
rc2test.c Update copyright year 2020-04-23 13:55:52 +01:00
rc4test.c Update copyright year 2020-04-23 13:55:52 +01:00
rc5test.c Update copyright year 2020-04-23 13:55:52 +01:00
rdrand_sanitytest.c
README-dev.md Rename NOTES*, README*, VERSION, HACKING, LICENSE to .md or .txt 2020-07-05 11:29:43 +02:00
README-external.md Fix many MarkDown issues in {NOTES*,README*,HACKING,LICENSE}.md files 2020-07-05 11:29:43 +02:00
README.md 99-test_fuzz.t: Clean up and re-organize such that sub-tests could be split easily 2020-07-16 21:44:26 +02:00
README.ssltest.md Fix issues reported by markdownlint 2020-05-08 16:22:02 +02:00
recordlentest.c Update copyright year 2020-04-23 13:55:52 +01:00
rsa_complex.c
rsa_mp_test.c Update copyright year 2020-04-23 13:55:52 +01:00
rsa_sp800_56b_test.c Add ACVP fips module tests 2020-06-17 11:33:16 +10:00
rsa_test.c Update copyright year 2020-04-23 13:55:52 +01:00
run_tests.pl Avoid uninitialised variable warning for jobs 2020-09-02 09:05:31 +03:00
sanitytest.c
secmemtest.c Update copyright year 2020-04-23 13:55:52 +01:00
serverinfo2.pem
serverinfo.pem
servername_test.c Update copyright year 2020-04-23 13:55:52 +01:00
session.pem
shibboleth.pfx
shlibloadtest.c Reorganize public header files (part 1) 2019-09-28 20:26:36 +02:00
siphash_internal_test.c Reorganize private crypto header files 2019-09-28 20:26:34 +02:00
sm2_internal_test.c Update copyright year 2020-04-23 13:55:52 +01:00
sm4_internal_test.c Reorganize private crypto header files 2019-09-28 20:26:34 +02:00
smcont.txt
sparse_array_test.c Reorganize private crypto header files 2019-09-28 20:26:34 +02:00
srptest.c
ssl_cert_table_internal_test.c Reorganize local header files 2019-09-28 20:26:35 +02:00
ssl_ctx_test.c Update copyright year 2020-05-15 14:09:49 +01:00
ssl_test_ctx_test.c testutil: Make SETUP_TEST_FIXTURE return 0 on fixture == NULL 2020-08-21 09:04:09 +02:00
ssl_test_ctx_test.cnf Use .cnf for config files, not .conf 2020-03-06 18:25:13 +01:00
ssl_test_ctx.c Fix safestack issues in x509.h 2020-09-13 11:09:45 +01:00
ssl_test_ctx.h Add X509 related libctx changes. 2020-07-24 22:53:27 +10:00
ssl_test.c Fix safestack issues in x509.h 2020-09-13 11:09:45 +01:00
ssl_test.tmpl
sslapitest.c Fix safestack issues in srp.h 2020-09-13 11:10:41 +01:00
sslbuffertest.c Update copyright year 2020-04-23 13:55:52 +01:00
sslcorrupttest.c Fix safestack issues in ssl.h 2020-09-13 11:09:45 +01:00
ssltest_old.c Fix stacks of OPENSSL_STRING, OPENSSL_CSTRING and OPENSSL_BLOCK 2020-09-13 11:10:39 +01:00
ssltestlib.c Fix error path in int create_ssl_ctx_pair() 2020-06-05 10:31:58 +01:00
ssltestlib.h Update copyright year 2020-04-23 13:55:52 +01:00
stack_test.c
sysdefault.cnf
sysdefaulttest.c
test_test.c
test.cnf Add -section option to 'req' command 2020-03-07 12:58:02 +03:00
testcrl.pem
testdsa.pem
testdsapub.pem
testec-p256.pem
testecpub-p256.pem
tested448.pem More testing for CLI usage of Ed25519 and Ed448 keys 2019-12-11 18:37:53 +01:00
tested448pub.pem More testing for CLI usage of Ed25519 and Ed448 keys 2019-12-11 18:37:53 +01:00
tested25519.pem More testing for CLI usage of Ed25519 and Ed448 keys 2019-12-11 18:37:53 +01:00
tested25519pub.pem More testing for CLI usage of Ed25519 and Ed448 keys 2019-12-11 18:37:53 +01:00
testp7.pem
testreq2.pem
testrsa.pem Support writing RSA keys using the traditional format again 2020-09-09 18:32:10 +02:00
testrsapub.pem
testsid.pem
testutil.h testutil: Add provider.c with test_get_libctx(), to use at least for SSL and CMP 2020-08-21 09:04:09 +02:00
testx509.pem Extend X509 cert checks and error reporting in v3_{purp,crld}.c and x509_{set,vfy}.c 2020-09-11 07:42:22 +02:00
threadstest.c
time_offset_test.c
tls13ccstest.c Update copyright year 2020-04-23 13:55:52 +01:00
tls13encryptiontest.c Move MAC removal responsibility to the various protocol "enc" functions 2020-07-06 09:26:00 +01:00
tls13secretstest.c Update copyright year 2020-04-23 13:55:52 +01:00
tls-provider.c Test that EVP_default_properties_is_fips_enabled() works early 2020-08-17 11:27:51 +01:00
uitest.c apps_ui.c: Improve error handling and return value of setup_ui_method() 2020-09-10 22:01:07 +02:00
v3_ca_exts.cnf Make x509 -force_pubkey test case with self-issued cert more realistic 2020-07-01 11:14:54 +02:00
v3-cert1.pem
v3-cert2.pem
v3ext.c Update copyright year 2020-04-23 13:55:52 +01:00
v3nametest.c Fix safestack issues in x509v3.h 2020-09-13 11:09:45 +01:00
verify_extra_test.c Fix safestack issues in x509.h 2020-09-13 11:09:45 +01:00
versions.c
wpackettest.c WPACKET: don't write DER length when we don't want to 2020-05-04 05:50:06 +02:00
x509_check_cert_pkey_test.c Update copyright year 2020-04-23 13:55:52 +01:00
x509_dup_cert_test.c Update copyright year 2020-04-23 13:55:52 +01:00
x509_internal_test.c
x509_time_test.c Update copyright year 2020-04-23 13:55:52 +01:00
x509aux.c Update copyright year 2020-04-23 13:55:52 +01:00

Using OpenSSL Tests

After a successful build, and before installing, the libraries should be tested. Run:

$ make test                                      # Unix
$ mms test                                       ! OpenVMS
$ nmake test                                     # Windows

Warning: you MUST run the tests from an unprivileged account (or disable your privileges temporarily if your platform allows it).

If some tests fail, take a look at the section Test Failures below.

Test Failures

If some tests fail, look at the output. There may be reasons for the failure that isn't a problem in OpenSSL itself (like an OS malfunction or a Perl issue). You may want increased verbosity, that can be accomplished like this:

Full verbosity, showing full output of all successful and failed test cases (make macro VERBOSE or V):

$ make V=1 test                                  # Unix
$ mms /macro=(V=1) test                          ! OpenVMS
$ nmake V=1 test                                 # Windows

Verbosity on failed (sub-)tests only (VERBOSE_FAILURE or VF or REPORT_FAILURES):

$ make test VF=1

Verbosity on failed (sub-)tests, in addition progress on succeeded (sub-)tests (VERBOSE_FAILURE_PROGRESS or VFP or REPORT_FAILURES_PROGRESS):

$ make test VFP=1

If you want to run just one or a few specific tests, you can use the make variable TESTS to specify them, like this:

$ make TESTS='test_rsa test_dsa' test            # Unix
$ mms/macro="TESTS=test_rsa test_dsa" test       ! OpenVMS
$ nmake TESTS='test_rsa test_dsa' test           # Windows

And of course, you can combine (Unix examples shown):

$ make test TESTS='test_rsa test_dsa' VF=1
$ make test TESTS="test_cmp_*" VFP=1

You can find the list of available tests like this:

$ make list-tests                                # Unix
$ mms list-tests                                 ! OpenVMS
$ nmake list-tests                               # Windows

Have a look at the manual for the perl module Test::Harness to see what other HARNESS_* variables there are.

To report a bug please open an issue on GitHub, at https://github.com/openssl/openssl/issues.

For more details on how the make variables TESTS can be used, see section Running Selected Tests below.

Running Selected Tests

The make variable TESTS supports a versatile set of space separated tokens with which you can specify a set of tests to be performed. With a "current set of tests" in mind, initially being empty, here are the possible tokens:

 alltests      The current set of tests becomes the whole set of available
               tests (as listed when you do 'make list-tests' or similar).

 xxx           Adds the test 'xxx' to the current set of tests.

-xxx           Removes 'xxx' from the current set of tests.  If this is the
               first token in the list, the current set of tests is first
               assigned the whole set of available tests, effectively making
               this token equivalent to TESTS="alltests -xxx".

 nn            Adds the test group 'nn' (which is a number) to the current
               set of tests.

-nn            Removes the test group 'nn' from the current set of tests.
               If this is the first token in the list, the current set of
               tests is first assigned the whole set of available tests,
               effectively making this token equivalent to
               TESTS="alltests -xxx".

Also, all tokens except for "alltests" may have wildcards, such as *. (on Unix and Windows, BSD style wildcards are supported, while on VMS, it's VMS style wildcards)

Examples

Run all tests except for the fuzz tests:

$ make TESTS=-test_fuzz test

or, if you want to be explicit:

$ make TESTS='alltests -test_fuzz' test

Run all tests that have a name starting with "test_ssl" but not those starting with "test_ssl_":

$ make TESTS='test_ssl* -test_ssl_*' test

Run only test group 10:

$ make TESTS='10' test

Run all tests except the slow group (group 99):

$ make TESTS='-99' test

Run all tests in test groups 80 to 99 except for tests in group 90:

$ make TESTS='[89]? -90' test

To run specific fuzz tests you can use for instance:

$ make test TESTS=test_fuzz FUZZ_TESTS="cmp cms"

To stochastically verify that the algorithm that produces uniformly distributed random numbers is operating correctly (with a false positive rate of 0.01%):

$ ./util/wrap.sh test/bntest -stochastic

Running Tests in Parallel

By default the test harness will execute the selected tests sequentially. Depending on the platform characteristics, running more than one test job in parallel may speed up test execution. This can be requested by setting the HARNESS_JOBS environment variable to a positive integer value. This specifies the maximum number of test jobs to run in parallel.

Depending on the Perl version different strategies could be adopted to select which test recipes can be run in parallel. In recent versions of Perl, unless specified otherwise, any task can be run in parallel. Consult the documentation for TAP::Harness to know more.

To run up to four tests in parallel at any given time:

$ make HARNESS_JOBS=4 test