diff --git a/helper/tlsutil/testdata/README.md b/helper/tlsutil/testdata/README.md
index 03c809f98..e9814d311 100644
--- a/helper/tlsutil/testdata/README.md
+++ b/helper/tlsutil/testdata/README.md
@@ -1,6 +1,6 @@
 # Nomad Test Certificate
 
-Using [cfssl 1.2.0](https://github.com/cloudflare/cfssl)
+Using [cfssl 1.6.0](https://github.com/cloudflare/cfssl)
 
 | File                | Description               |
 |---------------------|---------------------------|
@@ -16,17 +16,24 @@ Using [cfssl 1.2.0](https://github.com/cloudflare/cfssl)
 
 ## Generating self-signed certs
 ```sh
-# Write defaults and update
+# Write defaults and update.
+# NOTE: this doesn't need to be run if regenerating old certificates and
+# shouldn't as it overrides non-default values.
 cfssl print-defaults csr > ca-csr.json
+cfssl print-defaults csr > ca-bad-csr.json
 cfssl print-defaults config > ca-config.json
 
-# Generate CA certificate and key
-cfssl gencert -config ca-config.json -initca ca-csr.json | cfssljson -bare ca -
+# Generate CA certificates and keys.
+#
+# 1. Generates ca.csr, ca.pem, and ca-key.pem.
+# 2. Generates ca-bad.csr, ca-bad.pem, and ca-bad-key.pem.
+cfssl gencert -loglevel=5 -config ca-config.json -initca ca-csr.json | cfssljson -bare ca -
+cfssl gencert -loglevel=5 -config ca-config.json -initca ca-bad-csr.json | cfssljson -bare ca-bad -
 
-# Generate Nomad certificate and key
-cfssl gencert -ca ca.pem -ca-key ca-key.pem -config ca-config.json nomad-foo-csr.json | cfssljson -bare nomad-foo
-
-# Generate bad region CA and certificate
-cfssl gencert -config ca-config.json -initca ca-bad-csr.json | cfssljson -bare ca-bad -
-cfssl gencert -ca ca-bad.pem -ca-key ca-bad-key.pem -config ca-config.json nomad-bad-csr.json | cfssljson -bare nomad-bad
+# Generate certificates and keys.
+#
+# 1. Generates nomad-foo.csr, nomad-foo.pem, and nomad-foo-key.pem.
+# 1. Generates nomad-bad.csr, nomad-bad.pem, and nomad-bad-key.pem.
+cfssl gencert -loglevel=5 -ca ca.pem -ca-key ca-key.pem -config ca-config.json nomad-foo-csr.json | cfssljson -bare nomad-foo
+cfssl gencert -loglevel=5 -ca ca-bad.pem -ca-key ca-bad-key.pem -config ca-config.json nomad-bad-csr.json | cfssljson -bare nomad-bad
 ```
diff --git a/helper/tlsutil/testdata/ca-bad-key.pem b/helper/tlsutil/testdata/ca-bad-key.pem
index 564b55385..37ae26449 100644
--- a/helper/tlsutil/testdata/ca-bad-key.pem
+++ b/helper/tlsutil/testdata/ca-bad-key.pem
@@ -1,5 +1,5 @@
 -----BEGIN EC PRIVATE KEY-----
-MHcCAQEEIMoAkGQf6pbzlfkfde2eqJ2aRHd57UlLGyeHKZl5uBCRoAoGCCqGSM49
-AwEHoUQDQgAEVdRIolwS83FQtAGQr1B+TLei8Dl16ohJKRU9VabjAsfAes+Bdc7J
-W0pSdKR7OodyvASRkswPEV8a8Q7UEE+nQQ==
+MHcCAQEEIM9NSxYeRvnFLx/z6iLN3eJw+hgW2GOf4YDxOWwNxFuKoAoGCCqGSM49
+AwEHoUQDQgAEjGPxvMgyhwrYxM6Y7MWdgELE33ut7aXbGO8p+IFlfQUy3q/0OK3p
+Fjmpqh1XApvOXo7Z3YjdpO3M2aMOSi6BRg==
 -----END EC PRIVATE KEY-----
diff --git a/helper/tlsutil/testdata/ca-bad.csr b/helper/tlsutil/testdata/ca-bad.csr
index 723e3bd08..d2dcc3ab1 100644
--- a/helper/tlsutil/testdata/ca-bad.csr
+++ b/helper/tlsutil/testdata/ca-bad.csr
@@ -1,9 +1,9 @@
 -----BEGIN CERTIFICATE REQUEST-----
-MIIBODCB3gIBADB8MQswCQYDVQQGEwJVUzETMBEGA1UECBMKQ2FsaWZvcm5pYTEW
+MIIBNzCB3gIBADB8MQswCQYDVQQGEwJVUzETMBEGA1UECBMKQ2FsaWZvcm5pYTEW
 MBQGA1UEBxMNU2FuIEZyYW5jaXNjbzESMBAGA1UEChMJSGFzaGlDb3JwMQ4wDAYD
 VQQLEwVOb21hZDEcMBoGA1UEAxMTYmFkLm5vbWFkLmhhc2hpY29ycDBZMBMGByqG
-SM49AgEGCCqGSM49AwEHA0IABFXUSKJcEvNxULQBkK9Qfky3ovA5deqISSkVPVWm
-4wLHwHrPgXXOyVtKUnSkezqHcrwEkZLMDxFfGvEO1BBPp0GgADAKBggqhkjOPQQD
-AgNJADBGAiEAlDrhex3blc/xFbgtqbgm6W6EfLTkc8nqypeujpRhkFkCIQCsNM3u
-/mfAk4r1krhVe74l65Qkwe4SyPY72O1xwNtmDw==
+SM49AgEGCCqGSM49AwEHA0IABIxj8bzIMocK2MTOmOzFnYBCxN97re2l2xjvKfiB
+ZX0FMt6v9Dit6RY5qaodVwKbzl6O2d2I3aTtzNmjDkougUagADAKBggqhkjOPQQD
+AgNIADBFAiEA4IyK8liUiVVaCSmP3BqJpkEPCEiJ3bph7mN2Urrlb7ICIBu1q1Xa
+kJunzBkREZcmpwVp2IUlTFaQvvy7eeRL4obB
 -----END CERTIFICATE REQUEST-----
diff --git a/helper/tlsutil/testdata/ca-bad.pem b/helper/tlsutil/testdata/ca-bad.pem
index 68f1ddf40..f15d0bd87 100644
--- a/helper/tlsutil/testdata/ca-bad.pem
+++ b/helper/tlsutil/testdata/ca-bad.pem
@@ -1,14 +1,14 @@
 -----BEGIN CERTIFICATE-----
-MIICPDCCAeKgAwIBAgIUfYHyE7pTzpWRRdlA8PrR0EphEXowCgYIKoZIzj0EAwIw
+MIICOzCCAeKgAwIBAgIUeXTO3L4oiO38Y33Opu8YrQj9HlYwCgYIKoZIzj0EAwIw
 fDELMAkGA1UEBhMCVVMxEzARBgNVBAgTCkNhbGlmb3JuaWExFjAUBgNVBAcTDVNh
 biBGcmFuY2lzY28xEjAQBgNVBAoTCUhhc2hpQ29ycDEOMAwGA1UECxMFTm9tYWQx
-HDAaBgNVBAMTE2JhZC5ub21hZC5oYXNoaWNvcnAwHhcNMTYxMTEwMjAxMDAwWhcN
-MjExMTA5MjAxMDAwWjB8MQswCQYDVQQGEwJVUzETMBEGA1UECBMKQ2FsaWZvcm5p
+HDAaBgNVBAMTE2JhZC5ub21hZC5oYXNoaWNvcnAwHhcNMjEwODEzMDg1MjAwWhcN
+MjYwODEyMDg1MjAwWjB8MQswCQYDVQQGEwJVUzETMBEGA1UECBMKQ2FsaWZvcm5p
 YTEWMBQGA1UEBxMNU2FuIEZyYW5jaXNjbzESMBAGA1UEChMJSGFzaGlDb3JwMQ4w
 DAYDVQQLEwVOb21hZDEcMBoGA1UEAxMTYmFkLm5vbWFkLmhhc2hpY29ycDBZMBMG
-ByqGSM49AgEGCCqGSM49AwEHA0IABFXUSKJcEvNxULQBkK9Qfky3ovA5deqISSkV
-PVWm4wLHwHrPgXXOyVtKUnSkezqHcrwEkZLMDxFfGvEO1BBPp0GjQjBAMA4GA1Ud
-DwEB/wQEAwIBBjAPBgNVHRMBAf8EBTADAQH/MB0GA1UdDgQWBBQc8MtKDOUeoESH
-5zgDsd5PQZbKAjAKBggqhkjOPQQDAgNIADBFAiBQOS75fLCOvNKo8yNlPFW0/QRA
-yq6X3mXiVysaoWA7zwIhAIbRn1g6KFhvLNWGgVrl4DRn1PtNIiPWiGoeMRzM0PKI
+ByqGSM49AgEGCCqGSM49AwEHA0IABIxj8bzIMocK2MTOmOzFnYBCxN97re2l2xjv
+KfiBZX0FMt6v9Dit6RY5qaodVwKbzl6O2d2I3aTtzNmjDkougUajQjBAMA4GA1Ud
+DwEB/wQEAwIBBjAPBgNVHRMBAf8EBTADAQH/MB0GA1UdDgQWBBRybjwTW9incERj
+Y/Bw7E9iVcdhPDAKBggqhkjOPQQDAgNHADBEAiAkv5FG1AF8VVeytFSsqelinpB2
+ETojhNxgm95bFKIqpAIgfhFdNVes9XJflthIJo9mSWsH2ht0CXwcwMuGxNLgy1E=
 -----END CERTIFICATE-----
diff --git a/helper/tlsutil/testdata/ca-key.pem b/helper/tlsutil/testdata/ca-key.pem
index 32dbbf25e..871bea7a6 100644
--- a/helper/tlsutil/testdata/ca-key.pem
+++ b/helper/tlsutil/testdata/ca-key.pem
@@ -1,5 +1,5 @@
 -----BEGIN EC PRIVATE KEY-----
-MHcCAQEEIA2odCg8+DKEDN1JgtU9FEikLPTBlbwqOwfnWKCMHecdoAoGCCqGSM49
-AwEHoUQDQgAEXyZk3R82CDDw/EivpI+RnO/X5qTnIOsJ2+CTVcAqlsPTvrjXWSWV
-kouEP+B6IzORU0gamMTYEq5mP6N6EKwj5Q==
+MHcCAQEEIM3rBHk5t/VtMgspx2/amPd2/LcaLdXr3FjRac3OrFCaoAoGCCqGSM49
+AwEHoUQDQgAEBCIpONsFqQMf1P4Jf5X23mw9wQBIrFfr900fTRXge2R5X8auQEnV
+rnCeVomK8sY3B2XAVitL6KIpcNuIkYD7ug==
 -----END EC PRIVATE KEY-----
diff --git a/helper/tlsutil/testdata/ca.csr b/helper/tlsutil/testdata/ca.csr
index 37d6497e3..6e8d63550 100644
--- a/helper/tlsutil/testdata/ca.csr
+++ b/helper/tlsutil/testdata/ca.csr
@@ -2,8 +2,8 @@
 MIIBNDCB2gIBADB4MQswCQYDVQQGEwJVUzETMBEGA1UECBMKQ2FsaWZvcm5pYTEW
 MBQGA1UEBxMNU2FuIEZyYW5jaXNjbzESMBAGA1UEChMJSGFzaGlDb3JwMQ4wDAYD
 VQQLEwVOb21hZDEYMBYGA1UEAxMPbm9tYWQuaGFzaGljb3JwMFkwEwYHKoZIzj0C
-AQYIKoZIzj0DAQcDQgAEXyZk3R82CDDw/EivpI+RnO/X5qTnIOsJ2+CTVcAqlsPT
-vrjXWSWVkouEP+B6IzORU0gamMTYEq5mP6N6EKwj5aAAMAoGCCqGSM49BAMCA0kA
-MEYCIQD2LSQOIxKrDTDmGNyVxWZMrdKake40LTQV8oE26FlWOAIhAON6vRr1KVVg
-uLc9+7FyjRvL/q8GLWKKuFO2RvtRSmnS
+AQYIKoZIzj0DAQcDQgAEBCIpONsFqQMf1P4Jf5X23mw9wQBIrFfr900fTRXge2R5
+X8auQEnVrnCeVomK8sY3B2XAVitL6KIpcNuIkYD7uqAAMAoGCCqGSM49BAMCA0kA
+MEYCIQCmPOKtb8kE6Qof97bu1R3qdi1Q6K5MsxMm4weGGNaKswIhAIibKtTD7xsa
+/4vLSZJPdCZTmpllsMHS7dQxnkTzFh/9
 -----END CERTIFICATE REQUEST-----
diff --git a/helper/tlsutil/testdata/ca.pem b/helper/tlsutil/testdata/ca.pem
index 9666d2912..54b5a9e45 100644
--- a/helper/tlsutil/testdata/ca.pem
+++ b/helper/tlsutil/testdata/ca.pem
@@ -1,14 +1,14 @@
 -----BEGIN CERTIFICATE-----
-MIICMzCCAdqgAwIBAgIUNZ9L86Xp9EuDH0/qyAesh599LXQwCgYIKoZIzj0EAwIw
+MIICNDCCAdqgAwIBAgIUMOrtAaeiKw9TR7Rq6KI+V2liZZIwCgYIKoZIzj0EAwIw
 eDELMAkGA1UEBhMCVVMxEzARBgNVBAgTCkNhbGlmb3JuaWExFjAUBgNVBAcTDVNh
 biBGcmFuY2lzY28xEjAQBgNVBAoTCUhhc2hpQ29ycDEOMAwGA1UECxMFTm9tYWQx
-GDAWBgNVBAMTD25vbWFkLmhhc2hpY29ycDAeFw0xNjExMTAxOTQ4MDBaFw0yMTEx
-MDkxOTQ4MDBaMHgxCzAJBgNVBAYTAlVTMRMwEQYDVQQIEwpDYWxpZm9ybmlhMRYw
+GDAWBgNVBAMTD25vbWFkLmhhc2hpY29ycDAeFw0yMTA4MTMwODQ2MDBaFw0yNjA4
+MTIwODQ2MDBaMHgxCzAJBgNVBAYTAlVTMRMwEQYDVQQIEwpDYWxpZm9ybmlhMRYw
 FAYDVQQHEw1TYW4gRnJhbmNpc2NvMRIwEAYDVQQKEwlIYXNoaUNvcnAxDjAMBgNV
 BAsTBU5vbWFkMRgwFgYDVQQDEw9ub21hZC5oYXNoaWNvcnAwWTATBgcqhkjOPQIB
-BggqhkjOPQMBBwNCAARfJmTdHzYIMPD8SK+kj5Gc79fmpOcg6wnb4JNVwCqWw9O+
-uNdZJZWSi4Q/4HojM5FTSBqYxNgSrmY/o3oQrCPlo0IwQDAOBgNVHQ8BAf8EBAMC
-AQYwDwYDVR0TAQH/BAUwAwEB/zAdBgNVHQ4EFgQUOjVq/BectnhcKn6EHUD4NJFm
-/UAwCgYIKoZIzj0EAwIDRwAwRAIgTemDJGSGtcQPXLWKiQNw4SKO9wAPhn/WoKW4
-Ln2ZUe8CIDsQswBQS7URbqnKYDye2Y4befJkr4fmhhmMQb2ex9A4
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+xq5ASdWucJ5WiYryxjcHZcBWK0vooilw24iRgPu6o0IwQDAOBgNVHQ8BAf8EBAMC
+AQYwDwYDVR0TAQH/BAUwAwEB/zAdBgNVHQ4EFgQUomQ0rTTqNWz95h/jDTSNyJCP
+YwQwCgYIKoZIzj0EAwIDSAAwRQIhAK6StWS84EMx8G73jr66l9L8GQVer2UcpPgy
+7wlFD5kQAiA0kjySsH3FzLnqrrUS7f4BrzBv+TDBvVbLFlc41bpTQQ==
 -----END CERTIFICATE-----
diff --git a/helper/tlsutil/testdata/nomad-bad-key.pem b/helper/tlsutil/testdata/nomad-bad-key.pem
index 857170d51..ede5f1a4f 100644
--- a/helper/tlsutil/testdata/nomad-bad-key.pem
+++ b/helper/tlsutil/testdata/nomad-bad-key.pem
@@ -1,5 +1,5 @@
 -----BEGIN EC PRIVATE KEY-----
-MHcCAQEEIK7Z1byjkuIHrqi+yEv4YFECfWwRgVe/+jM2ubT/vSHtoAoGCCqGSM49
-AwEHoUQDQgAEJOqFycJcTayr5epKXnkeDSXORGBSNm98u6HY2LueSaeLCPdSVQ6p
-6cmrZMhpmr3QFmuLdFOh5HmlqipNev2XGA==
+MHcCAQEEIIdLbfRt+KZFZrn6BsaCmi/8n3+gzqDgU2KYEc3bs/YLoAoGCCqGSM49
+AwEHoUQDQgAE5EO2FyHkS9sgGpNwnXg22Lnolp1WwyChw+ONMGyG3i9GKQp7m39D
+1TaarEHl1d1Xt/SH+nFObPuIk3rHZcZ3JA==
 -----END EC PRIVATE KEY-----
diff --git a/helper/tlsutil/testdata/nomad-bad.csr b/helper/tlsutil/testdata/nomad-bad.csr
index d42fd6757..8685599cc 100644
--- a/helper/tlsutil/testdata/nomad-bad.csr
+++ b/helper/tlsutil/testdata/nomad-bad.csr
@@ -2,10 +2,10 @@
 MIIBgDCCASYCAQAweDELMAkGA1UEBhMCVVMxEzARBgNVBAgTCkNhbGlmb3JuaWEx
 FjAUBgNVBAcTDVNhbiBGcmFuY2lzY28xEjAQBgNVBAoTCUhhc2hpQ29ycDEOMAwG
 A1UECxMFTm9tYWQxGDAWBgNVBAMTD3JlZ2lvbkJhZC5ub21hZDBZMBMGByqGSM49
-AgEGCCqGSM49AwEHA0IABCTqhcnCXE2sq+XqSl55Hg0lzkRgUjZvfLuh2Ni7nkmn
-iwj3UlUOqenJq2TIaZq90BZri3RToeR5paoqTXr9lxigTDBKBgkqhkiG9w0BCQ4x
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-ZWdpb25CYWQubm9tYWQwCgYIKoZIzj0EAwIDSAAwRQIgXmUj5179tpsp/dkLBLJD
-TcMCsPOowiEZ+49yxGT6NuwCIQCPGRJTCZ9qlUQCZ5zaFbigxscl1ACMNLhlhaWx
-XawgdQ==
+ZWdpb25CYWQubm9tYWQwCgYIKoZIzj0EAwIDSAAwRQIhAKnj9VZmqXp8kZ7akGpz
+yP04Gyz5b6JnSDalkaaUekdBAiAAqqna5G8NLoQDQ5Kj8uLm5FyTuhE7eDHN1Xiz
+PBWAaQ==
 -----END CERTIFICATE REQUEST-----
diff --git a/helper/tlsutil/testdata/nomad-bad.pem b/helper/tlsutil/testdata/nomad-bad.pem
index b1890d5bd..8fec5fe1c 100644
--- a/helper/tlsutil/testdata/nomad-bad.pem
+++ b/helper/tlsutil/testdata/nomad-bad.pem
@@ -1,17 +1,17 @@
 -----BEGIN CERTIFICATE-----
-MIICtTCCAlqgAwIBAgIUQp/L2szbgE4b1ASlPOZMReFE27owCgYIKoZIzj0EAwIw
+MIICtTCCAlqgAwIBAgIUBXPfd1hp+fQszuZVdTyZZh0KoAUwCgYIKoZIzj0EAwIw
 fDELMAkGA1UEBhMCVVMxEzARBgNVBAgTCkNhbGlmb3JuaWExFjAUBgNVBAcTDVNh
 biBGcmFuY2lzY28xEjAQBgNVBAoTCUhhc2hpQ29ycDEOMAwGA1UECxMFTm9tYWQx
-HDAaBgNVBAMTE2JhZC5ub21hZC5oYXNoaWNvcnAwIBcNMTYxMTEwMjAxMDAwWhgP
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 DjAMBgNVBAsTBU5vbWFkMRgwFgYDVQQDEw9yZWdpb25CYWQubm9tYWQwWTATBgcq
-hkjOPQIBBggqhkjOPQMBBwNCAAQk6oXJwlxNrKvl6kpeeR4NJc5EYFI2b3y7odjY
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-AQH/BAIwADAdBgNVHQ4EFgQUxhzOftFR2L0QAPx8LOuP99WPbpgwHwYDVR0jBBgw
-FoAUHPDLSgzlHqBEh+c4A7HeT0GWygIwOQYDVR0RBDIwMIIWc2VydmVyLnJlZ2lv
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 bkJhZC5ub21hZIIWY2xpZW50LnJlZ2lvbkJhZC5ub21hZDAKBggqhkjOPQQDAgNJ
-ADBGAiEAq2rnBeX/St/8i9Cab7Yw0C7pjcaE+mrFYeQByng1Uc0CIQD/o4BrZdkX
-Nm7QGTRZbUFZTHYZr0ULz08Iaz2aHQ6Mcw==
+ADBGAiEA6d+gBYWuAiOUU/wWXAoiSBgeNM0JXA82idFaVRVm7TYCIQDrX6O783ZM
+FG0XIRoriOWNq9ysmP8D73KrMHkJtTRSTg==
 -----END CERTIFICATE-----
diff --git a/helper/tlsutil/testdata/nomad-foo-key.pem b/helper/tlsutil/testdata/nomad-foo-key.pem
index 79b50cdbe..61eadd341 100644
--- a/helper/tlsutil/testdata/nomad-foo-key.pem
+++ b/helper/tlsutil/testdata/nomad-foo-key.pem
@@ -1,5 +1,5 @@
 -----BEGIN EC PRIVATE KEY-----
-MHcCAQEEIIQUxKnz5rmqTCrpNk93WMWMtGTQ1tWk6vIojuvFm86aoAoGCCqGSM49
-AwEHoUQDQgAE6oZIU2Ob4QGUtiXGYg/pJBN1fxT/qFs9Y5sHR9+QQ78IXB55ghVZ
-vcUo0+pgCWEyqDUrSKV4PQVuETNqs/Swvg==
+MHcCAQEEIH2tGBcTtZ43pPNsyLcO44eBOcp8Bevnf2kCcZeLhpzAoAoGCCqGSM49
+AwEHoUQDQgAECXq2d0JCbbmFAMnQ8rBj7nYa47NxiluAi3ybk7sxh8LWpYU3Rsdh
+P71yaSkAYkMhNcBDjuacjH4A00bMVA1L6Q==
 -----END EC PRIVATE KEY-----
diff --git a/helper/tlsutil/testdata/nomad-foo.csr b/helper/tlsutil/testdata/nomad-foo.csr
index 8f387aa73..0855a4a57 100644
--- a/helper/tlsutil/testdata/nomad-foo.csr
+++ b/helper/tlsutil/testdata/nomad-foo.csr
@@ -2,10 +2,10 @@
 MIIBgDCCASYCAQAweDELMAkGA1UEBhMCVVMxEzARBgNVBAgTCkNhbGlmb3JuaWEx
 FjAUBgNVBAcTDVNhbiBGcmFuY2lzY28xEjAQBgNVBAoTCUhhc2hpQ29ycDEOMAwG
 A1UECxMFTm9tYWQxGDAWBgNVBAMTD3JlZ2lvbkZvby5ub21hZDBZMBMGByqGSM49
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diff --git a/helper/tlsutil/testdata/nomad-foo.pem b/helper/tlsutil/testdata/nomad-foo.pem
index eeba48033..8b5911903 100644
--- a/helper/tlsutil/testdata/nomad-foo.pem
+++ b/helper/tlsutil/testdata/nomad-foo.pem
@@ -1,17 +1,17 @@
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