diff --git a/test/config/another-ca1.pem b/test/config/another-ca1.pem
new file mode 100644
index 00000000..50825d47
--- /dev/null
+++ b/test/config/another-ca1.pem
@@ -0,0 +1,19 @@
+-----BEGIN CERTIFICATE-----
+MIIDADCCAeigAwIBAgIUQZjM/5qoAF78qIDyc+rKi4qBdOIwDQYJKoZIhvcNAQEL
+BQAwGDEWMBQGA1UEAxMNa3ViZXJuZXRlcy1jYTAeFw0yMjAzMjIxNDQzMDBaFw0z
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+H17K2BgAzdh6xRKPQd0BGTUpJBfk50R2gDMj7FKyIzBN69IOGytBfAXBhHzEGy4+
+MvtTEIMUjR//KgCrpNeyDuaWHttR5FdnuRxFO7O3BAfyNSaNmd/IEHQf7DIGgzOy
++xWLyH/HRHj5C70qAqjbnrgBODI99BsA9U7oXTuyPLdIboAcFt2zD5DIYgZET52X
+53w4jA==
+-----END CERTIFICATE-----
diff --git a/test/config/another-ca2.pem b/test/config/another-ca2.pem
new file mode 100644
index 00000000..53be72e8
--- /dev/null
+++ b/test/config/another-ca2.pem
@@ -0,0 +1,19 @@
+-----BEGIN CERTIFICATE-----
+MIIDADCCAeigAwIBAgIUHW3OPnmuTquJ0YgbGpmm/blsY2QwDQYJKoZIhvcNAQEL
+BQAwGDEWMBQGA1UEAxMNa3ViZXJuZXRlcy1jYTAeFw0yMjAzMjIxNDQ0MDBaFw0z
+MjAzMTkxNDQ0MDBaMBgxFjAUBgNVBAMTDWt1YmVybmV0ZXMtY2EwggEiMA0GCSqG
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+zQDjfmmYsH0T2ZRtBpE1dYrUbU3tkizcMZRJBgreoxoff+r5coibMIm/7gh+YoSb
+BCItCaeuGSKQ8CJb8DElcPUd6nKUjmeiQL68ztsG/+CXLiL/TZb914VaaCXvPInw
+49jJ7w==
+-----END CERTIFICATE-----
diff --git a/test/config/concatenated-ca.kubeconfig b/test/config/concatenated-ca.kubeconfig
new file mode 100644
index 00000000..ed20e4dd
--- /dev/null
+++ b/test/config/concatenated-ca.kubeconfig
@@ -0,0 +1,20 @@
+apiVersion: v1
+clusters:
+- cluster:
+    certificate-authority: concatenated-ca.pem
+    server: https://localhost:6443
+  name: local
+contexts:
+- context:
+    cluster: local
+    namespace: default
+    user: user
+  name: Default
+current-context: Default
+kind: Config
+preferences: {}
+users:
+- name: user
+  user:
+    client-certificate: external-cert.pem
+    client-key: external-key.rsa
diff --git a/test/config/concatenated-ca.pem b/test/config/concatenated-ca.pem
new file mode 100644
index 00000000..330f04ae
--- /dev/null
+++ b/test/config/concatenated-ca.pem
@@ -0,0 +1,57 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
+-----BEGIN CERTIFICATE-----
+MIIDADCCAeigAwIBAgIUVL5Bj6YYpqFeUclFcIGSH37AIqkwDQYJKoZIhvcNAQEL
+BQAwGDEWMBQGA1UEAxMNa3ViZXJuZXRlcy1jYTAeFw0yMjAzMjIxNDQ3MDBaFw0z
+MjAzMTkxNDQ3MDBaMBgxFjAUBgNVBAMTDWt1YmVybmV0ZXMtY2EwggEiMA0GCSqG
+SIb3DQEBAQUAA4IBDwAwggEKAoIBAQDQXnD7p7ah6sM/2zRPTnnljBM9iGS63xXi
+i7pD4NTHTljQ2lRIM0+M7SBXJn7WtaOLlDMQcLOr9gtRIJwEfiyWfyMag448x45W
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+yI48ZOEcuTBTFCQELqd+UWpvLEY7xde16/XZLtn+qYEb5ZEO/E1JfYhDiY5AUgjq
+DvKQXwpKbZd4mxnBUG/EY7hleIOClwh6NGY+Rhhwim5J25qWtyeBOIbhqNoSdN/o
+YsO6uf/56mlPsNJ6cWcvTKb9ZXVy2wWaERXesf9C3jMOh4IreRgxAgMBAAGjQjBA
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+0sOCZ2QbE/g4FWo/7mtyIjANBgkqhkiG9w0BAQsFAAOCAQEAU2Tq1GuOHks8ccYV
+7HrXQYvEoPsGRouD25J5pc0I2o4d3aReUritNg167zw1AssmhqDICWUFKUAbTMVy
+vsE2MiRHhMccBTFiSP8OWcVdML7XEB4R2am5UjGP82DpzBHoPmqhWPqU+/sZ+O2P
+Uf3R68ywidVp/dxhr70eBYiV8nkzuSYktIa31zOiwwbTHuNDd811NmLYr9sWnUrY
+VdMEkMlPtlYkpcOUkpNoZUL1/ZPJEdsG3RzLFLvNya6pD4Xs6HKYvMwGMcIaEZRA
+Xbd06RNtHi4DdlDmdi4U31sUW37voylA2alDqfr9IyjoUwWh6kEFjY7RgUwQpBt7
+HRPemg==
+-----END CERTIFICATE-----
+-----BEGIN CERTIFICATE-----
+MIIDADCCAeigAwIBAgIUHW3OPnmuTquJ0YgbGpmm/blsY2QwDQYJKoZIhvcNAQEL
+BQAwGDEWMBQGA1UEAxMNa3ViZXJuZXRlcy1jYTAeFw0yMjAzMjIxNDQ0MDBaFw0z
+MjAzMTkxNDQ0MDBaMBgxFjAUBgNVBAMTDWt1YmVybmV0ZXMtY2EwggEiMA0GCSqG
+SIb3DQEBAQUAA4IBDwAwggEKAoIBAQDLMEJs5agS0hNQBxPTtsI6dIhIi/pY8liI
+sNukbi5KwKf80FYNyRXqE8ufDVyTFzOc+MG96jnHjDaBWjrVN9On0PgUBo4nPyd4
+DtyvYx2jMzwToSEIo/Z1aroMx1oGywCgdS4/3FWAbhlSbyXKJmhfh6gX0TxWz+dV
+zqNuqQq9EWuRhOMg9vgzjfp3mjiPE10lW8pT0j5JT3PI/eGO+C2Z7z33LJXb6GM2
+nXvhGFMGY+7XG65pqJ3L8g1mk+LjPiwyIItw8wPtrnrZ2VXMklMd5Mn+jgCTNe1B
+om0nPpPIiTblCr6gcNcVjy5WGN37OKlqrT0JTuSPHcxSUp05LFjDAgMBAAGjQjBA
+MA4GA1UdDwEB/wQEAwIBBjAPBgNVHRMBAf8EBTADAQH/MB0GA1UdDgQWBBQvV/sB
+wbR3UwjkLAMN+6P3fZ/3OjANBgkqhkiG9w0BAQsFAAOCAQEACAk4EQwCkw2EBsSR
+2SKoa1SjYFkZzIr/0/TB2YcMUvHF+RpvlD5vQ8/RJjeAl1kc6/niZ9TWCemjBLqI
+hPoFe49zr49DyQjC2ZfsXVJvFCr6g7o4q4DtQ6ltyBuTJbkn1hI+aB8zgvpofG44
+mKj18Y7tPvgXtRua4SaeBq777+22AOvKxPied9p4PTrMN4RKTP6+yIbLflej7dBD
+zQDjfmmYsH0T2ZRtBpE1dYrUbU3tkizcMZRJBgreoxoff+r5coibMIm/7gh+YoSb
+BCItCaeuGSKQ8CJb8DElcPUd6nKUjmeiQL68ztsG/+CXLiL/TZb914VaaCXvPInw
+49jJ7w==
+-----END CERTIFICATE-----
diff --git a/test/config/update_certs_k0s.rb b/test/config/update_certs_k0s.rb
index 84059bf4..2632d726 100755
--- a/test/config/update_certs_k0s.rb
+++ b/test/config/update_certs_k0s.rb
@@ -33,6 +33,8 @@ def sh!(*cmd)
 # The rest could easily be extracted from allinone.kubeconfig, but the test is more robust
 # if we don't reuse YAML and/or Kubeclient::Config parsing to construct test data.
 sh! "#{DOCKER} exec #{CONTAINER} cat /var/lib/k0s/pki/ca.crt     > test/config/external-ca.pem"
+sh! 'cat test/config/another-ca1.pem test/config/external-ca.pem '\
+    '    test/config/another-ca2.pem > test/config/concatenated-ca.pem'
 sh! "#{DOCKER} exec #{CONTAINER} cat /var/lib/k0s/pki/admin.crt  > test/config/external-cert.pem"
 sh! "#{DOCKER} exec #{CONTAINER} cat /var/lib/k0s/pki/admin.key  > test/config/external-key.rsa"
 
diff --git a/test/test_config.rb b/test/test_config.rb
index 98d2114f..d246624c 100644
--- a/test/test_config.rb
+++ b/test/test_config.rb
@@ -44,6 +44,12 @@ def test_external_nopath_absolute
     end
   end
 
+  def test_concatenated_ca
+    config = Kubeclient::Config.read(config_file('concatenated-ca.kubeconfig'))
+    assert_equal(['Default'], config.contexts)
+    check_context(config.context, ssl: true)
+  end
+
   def test_nouser
     config = Kubeclient::Config.read(config_file('nouser.kubeconfig'))
     assert_equal(['default/localhost:6443/nouser'], config.contexts)
diff --git a/test/test_real_cluster.rb b/test/test_real_cluster.rb
index 568c9374..5c1f4cf9 100644
--- a/test/test_real_cluster.rb
+++ b/test/test_real_cluster.rb
@@ -57,6 +57,23 @@ def test_real_cluster_verify_none
     check_cert_accepted(client2)
   end
 
+  def test_real_cluster_concatenated_ca
+    config = Kubeclient::Config.read(config_file('concatenated-ca.kubeconfig'))
+    context = config.context
+    client1 = Kubeclient::Client.new(
+      HOSTNAME_COVERED_BY_CERT, 'v1',
+      ssl_options: context.ssl_options.merge(verify_ssl: OpenSSL::SSL::VERIFY_PEER),
+      auth_options: context.auth_options
+    )
+    check_cert_accepted(client1)
+    client2 = Kubeclient::Client.new(
+      HOSTNAME_NOT_ON_CERT, 'v1',
+      ssl_options: context.ssl_options.merge(verify_ssl: OpenSSL::SSL::VERIFY_PEER),
+      auth_options: context.auth_options
+    )
+    check_cert_rejected(client2)
+  end
+
   private
 
   # Test cert checking on discovery, CRUD, and watch code paths.