diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index b6f7ccd6..a882a473 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -19,3 +19,19 @@ jobs:
       - uses: gradle/wrapper-validation-action@v1
       - uses: gradle/gradle-build-action@v2
       - run: ./gradlew build
+
+  os-integration-test:
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-java@v3
+        with:
+          distribution: temurin
+          java-version: 11
+      - uses: gradle/wrapper-validation-action@v1
+      - uses: gradle/gradle-build-action@v2
+      - run: bash os-integration-test/generate-keys.sh
+      - run: ./gradlew :os-integration-test:build
+        env:
+          SSH_PORT: 22
diff --git a/os-integration-test/bin/.gitignore b/os-integration-test/bin/.gitignore
deleted file mode 100644
index 06e4d12f..00000000
--- a/os-integration-test/bin/.gitignore
+++ /dev/null
@@ -1,2 +0,0 @@
-/test/
-/main/
diff --git a/os-integration-test/build.gradle b/os-integration-test/build.gradle
index 54e1fc0c..147b5092 100644
--- a/os-integration-test/build.gradle
+++ b/os-integration-test/build.gradle
@@ -14,9 +14,12 @@ dependencies {
 }
 
 test {
+    useJUnitPlatform()
     mustRunAfter ':server-integration-test:check'
 }
 
+test.enabled = System.getenv('SSH_PORT') != null
+
 task startSshAgent(type: Exec) {
     commandLine 'ssh-agent'
     standardOutput = new ByteArrayOutputStream()
diff --git a/os-integration-test/etc/ssh/id_ecdsa b/os-integration-test/etc/ssh/id_ecdsa
deleted file mode 100644
index b69b3f5c..00000000
--- a/os-integration-test/etc/ssh/id_ecdsa
+++ /dev/null
@@ -1,10 +0,0 @@
------BEGIN EC PRIVATE KEY-----
-MIIBaAIBAQQg2d776WhdQFfLXan9bhU/bcSaf6HZAv27Js851vDZMImggfowgfcC
-AQEwLAYHKoZIzj0BAQIhAP////8AAAABAAAAAAAAAAAAAAAA////////////////
-MFsEIP////8AAAABAAAAAAAAAAAAAAAA///////////////8BCBaxjXYqjqT57Pr
-vVV2mIa8ZR0GsMxTsPY7zjw+J9JgSwMVAMSdNgiG5wSTamZ44ROdJreBn36QBEEE
-axfR8uEsQkf4vOblY6RA8ncDfYEt6zOg9KE5RdiYwpZP40Li/hp/m47n60p8D54W
-K84zV2sxXs7LtkBoN79R9QIhAP////8AAAAA//////////+85vqtpxeehPO5ysL8
-YyVRAgEBoUQDQgAESZT7K4plmvEATrWFhPWybRw4ptSJ7l3rXNc/Dh6GBaLDJli0
-SYf6kOaH8xl/EHpbxBTE6P8KVJga1uesO4WbVg==
------END EC PRIVATE KEY-----
diff --git a/os-integration-test/etc/ssh/id_ecdsa.pub b/os-integration-test/etc/ssh/id_ecdsa.pub
deleted file mode 100644
index 49c65172..00000000
--- a/os-integration-test/etc/ssh/id_ecdsa.pub
+++ /dev/null
@@ -1 +0,0 @@
-ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBEmU+yuKZZrxAE61hYT1sm0cOKbUie5d61zXPw4ehgWiwyZYtEmH+pDmh/MZfxB6W8QUxOj/ClSYGtbnrDuFm1Y=
diff --git a/os-integration-test/etc/ssh/id_rsa b/os-integration-test/etc/ssh/id_rsa
deleted file mode 100644
index 47071143..00000000
--- a/os-integration-test/etc/ssh/id_rsa
+++ /dev/null
@@ -1,27 +0,0 @@
------BEGIN RSA PRIVATE KEY-----
-MIIEowIBAAKCAQEA78p/+WebOE48aQkyU9HLCezHgEXIVs6aXKH0rgBmlnmNIEf7
-y8TWdQ7qQT1esexhmGSpCj/p9iSfeWTv0wG7T0H66toUtuB7ZlV3iEDYXSeYBYKZ
-b+cABDhl9bfFcuLR5XDBrTGKfibyLqfGIh1uronPUDGhOf90Ng6G5ZQEK9e8g4BF
-PXGrUe9BSqorHppTlGmHPSkFmt4GfHeqx7X2gCNR5yulO6x/Wc15no8r0rejYU+4
-kNsiTBdBzqXUJpw6sSa+Yznlq4H9E28FtADd0166ixaVHctgwlhdFxDDmi2YSDTF
-dcsUoWAFM4am5z9L6CqCr/CGkhv4bSSgFSF5/QIDAQABAoIBAFKaP1t7BU1wJf9I
-271kF71jg5X8c/bzVNl0MQV/vdc4KBVmtqaLOBU6/hdbPLOt6jDE/DY7rizMkOMQ
-kkzt28iBwh4E4f3ddqTZ7ENTkzUD3qqHQrP5r1fE1dq/Y5Uf7Y5MOWugFUU/xU2t
-HePCn84gSvolHpUMGsxEVNPhGU7AZ8RBXLYi27ha3OWCqusDJJbQEYRO1xm+SV2t
-OzybhEEwYTwmNkPC/1pNyRu3zoG1h+tGR2t1yOK1n35ygRiL0lxDHmJ19sRxJ1vn
-jKAKU8hnjG1L/uQxVpleOt5TQhIq7wWLL7jO+EMYu5w+iptHGeRs+j/15jY3LFus
-V/3v+UECgYEA/MEKUzgl34YN8jMBS3/rzvp+C/4U0nUMyM5+SLa4slYxtL5QbLLu
-dPXUTlFSXxUa8OypzM0HqyyWzvXFiQ05Te63wS83rds9/ox6WHAfcwFnkJLIuqCR
-N2dNbD0fLV2ixtjNJLsPmVL3upY9/rSYLz9uvw/7/nW/O3AzpVaSbssCgYEA8t7X
-i21C4oeWUXJhYnVWWMNqNSoHXsaBMcA5U82aA24cCpoqqRcPpkVYBOlwksGOzJKa
-0rUpaiUknoaqO17o4Q5kKfQYbfGPJ5BnED2iDeVufbyEgfLK0lQX9LNR7Cxtxos6
-wSkOvyNllauu6CHCoYSM+EZTiCekAv0GKlgkGVcCgYB9skLAQBwVnUUyPctXELbk
-qA4nSKRyRWOmOYrz/mq7xcHScRLt+846vEZo7GhagNR1HD0VbKFzrykQo4kpLzpg
-V2dq22CFRZL/FD2D3b7GItyuOVE5/sA5HVaTjZIDrZ1V5lue+Kg5R9mLIUyTbpyA
-YrtgqUJYuZXwqUwF3ZfVIQKBgCpxcR+nl4G5Cjbvkz8+nDlk5SGnV6Rjcl58ZkhT
-7O9ehb4AlSX5pr167tfk58xt0QPFNxNNn5AyL4UYqZU4j+AMwMpoIwDLryXN4YUA
-EFr3VmjY0htXj8RT99/GmrF4TjLdUAZDo5UZnX4bg7SDedz6KhyVRbHMo6f2CebK
-gnx/AoGBAPMFUEa5Tgq7V4XgW6PLHA3SfXj7yNrE72V3aAVkVgkuGAbiOH08cOOF
-j9GBq+5NyawyVmVeOe9c/vZG8tPeEFl4550x7n69iCfl7Jaraf1JJF9aEDZprIqE
-w6LAtQVE3oH8HvbUEx6dNTMwo5e82tVei8PS1ez6qPfB9CiEns7S
------END RSA PRIVATE KEY-----
diff --git a/os-integration-test/etc/ssh/id_rsa.pub b/os-integration-test/etc/ssh/id_rsa.pub
deleted file mode 100644
index 5e52889f..00000000
--- a/os-integration-test/etc/ssh/id_rsa.pub
+++ /dev/null
@@ -1 +0,0 @@
-ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDvyn/5Z5s4TjxpCTJT0csJ7MeARchWzppcofSuAGaWeY0gR/vLxNZ1DupBPV6x7GGYZKkKP+n2JJ95ZO/TAbtPQfrq2hS24HtmVXeIQNhdJ5gFgplv5wAEOGX1t8Vy4tHlcMGtMYp+JvIup8YiHW6uic9QMaE5/3Q2DobllAQr17yDgEU9catR70FKqisemlOUaYc9KQWa3gZ8d6rHtfaAI1HnK6U7rH9ZzXmejyvSt6NhT7iQ2yJMF0HOpdQmnDqxJr5jOeWrgf0TbwW0AN3TXrqLFpUdy2DCWF0XEMOaLZhINMV1yxShYAUzhqbnP0voKoKv8IaSG/htJKAVIXn9
diff --git a/os-integration-test/etc/ssh/id_rsa_pass b/os-integration-test/etc/ssh/id_rsa_pass
deleted file mode 100644
index a41e6d04..00000000
--- a/os-integration-test/etc/ssh/id_rsa_pass
+++ /dev/null
@@ -1,30 +0,0 @@
------BEGIN RSA PRIVATE KEY-----
-Proc-Type: 4,ENCRYPTED
-DEK-Info: AES-128-CBC,849C5178C9A9417A297428134CEAA4A5
-
-WhtJT/g5q1Sz27hvJXOa9RWRakWYj3Ndi2/dpxWdXaWxoNaZkJr3xxqeegG797ze
-gLlQlPFZRJU9KGS3+JxLxV9lyRr16hHllWtg1gOOMniYMafoabK2lxOYzLsc2jUq
-5B1XqKDgwHfI9Jg1dCvZsyac+c6vv7BkzrwVVZj92C4IZl/YtmWKkNXOEbyJKNoq
-ONGoHV3DhVQbTK1qELMyh+H7CQCZdLPjwSn5X88x/wQeSpTvy3oOdcYwYXDeQfoM
-n87yxnc4Rw/pOj2HL0SXqx+FAzi3HW3ZIqL0JDfXhJPnSVTukkKhPsx1lljSgQcz
-ERTHlU2M+arXfUK+nnyw5wdqiTmXG2mhjGhN1wSfNZnlFTZDYAUVMlZ4I4WnlFJ2
-CyzlI1cP5heNS/+Pa5dDvTyeHOG/ciOeyAtn4F/lqv3muayjKLG2dIq6xni4yNZp
-/ZrAkH2zsHtBB7yzrRi7/Nh6n3YezTS/yR7kqlTKEByr2JccXdmUTNf1H42H+iOH
-4qekj7Qo/qOo1YwANKomkci6zEf6/EUDVvyl0P8GGh/0X6QI2o12ZOLVW4m+TD+Z
-IB4Nfl8QHTTfD6rkJUgIAjdqxY5nBhaFRKwsMLJx4Vstx4LIO5qHlRTYXViIt2DC
-eBmvxvJ5p9pRXidt6r02JcXckJ+LxWWZDViS8RPG1qsYxpCgwGcBrPMc3MZKAHxu
-/V61PzTdZ3e61Us7touIm6cRfa48gC0vOK86pLbAd1GyJxm/F5GwsuPNdYguw5TV
-sLnTPZEehdDmxadsU5fjwjbf5+85LmLj/tRKvtM10avhv/Z4lIjF8AEv16I9kzKE
-rd+F/sj2jpVXH3alkuCc5GCh8Pk/LTSothvElfwneiNDsQloROaW3Lz8RFOalkvs
-qxc8p4VrHkotp5Y96exNqS6xmojTCuX5r8ZIdmJZMo4DRWbQtNHdk2tJwlLIxTIH
-KjQHzBHLoeSGJOZjLbrk6y7m+9LZvkb6HksiYksGQ6WBxcEn/UYZssGHkmvo/UrN
-OvMSzUP091zkA23t6LtCPH00VXBTvNWWKPtPE+ySJEmu2cyG8Y7bGqV58SYM/aKs
-+zzfngYnqdg06D3V1r1tnoKWwEdNua/rYOEIeu5zvzMUAQDqPc6Tfjj1aBsAtTJv
-vTEWWIrtrC8Edjj3dOF4S0fZNtD4mqzfx4n4elFjvJq9u6cC+Ull36vSe2oINRiF
-DSpT+3MZDMapqaDdxSqJ/waKRrkUzXivSJZ1o4reu/TMtB5WdL8839PNURoQFNpK
-lqDxB7YzuqAgQugF1NtjEOPYaR5KLBO0NjSSa/AqQ8LIAEBUDbmX7+Dl5xfXX1gk
-NLtZ9sccXPoKONn0V8Q0NuCvquci1M3pdMNtXXXrfQDgRfaWOev2zB+62tuaab1n
-DOB91WXGPREceJqX56W035BKt+5m3dDyQHX12pL3vD0uWW222nSF3Bm0rFPjZQuV
-1so1D/HSnUifLbAKoICmSpwhF62S5Ygfb5RKbqP5sp24Q3jtt/v0Bc+YuOCaSOR7
-yQSEEaV4SNdjPIOR+9qe1qlGfCAqQRxrVfKTP5k1Yp4Hhf+jF0AQQx2I4Ctox0Qf
------END RSA PRIVATE KEY-----
diff --git a/os-integration-test/etc/ssh/id_rsa_pass.pub b/os-integration-test/etc/ssh/id_rsa_pass.pub
deleted file mode 100644
index a7e678bd..00000000
--- a/os-integration-test/etc/ssh/id_rsa_pass.pub
+++ /dev/null
@@ -1 +0,0 @@
-ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQC1xN7CzvOi8IOUqXs+y7BvCwr52enPvcaObR5ymVMZKwPiXXqNKOnvQsKv23JxSOfoHS7WeWqTCkxrawsTSB6ZO7qy6AHxF1qa26KGuwkgbAa7wZIAQtrAH/li04jllxDKYdcriq76poVVvK76q6ASxAy76eboWDrABBXhNWD1pHZj5pE0vKpdGRnAqe/vWIkkmJLy5cVwcrKz8RThtTYv1w5Wuzp2z4W7+O9oFXvYr76lztxLSMtgGcoM6hRUdn+CfBP4aN8LBr0MnvAcQec2aZUOEBFl8q73ZRQ10SmZciIaLEBI/MrB0Oa/TY48/FcQjwaFmQdyp2AIG/tQdzmx your_email@example.com
diff --git a/os-integration-test/etc/ssh/known_hosts b/os-integration-test/etc/ssh/known_hosts
deleted file mode 100644
index e0198bf3..00000000
--- a/os-integration-test/etc/ssh/known_hosts
+++ /dev/null
@@ -1 +0,0 @@
-localhost ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBNvZCmB74GsbDpIp+LaVPO5tQ9LkViA4YkE5XciA0Yk4/ir6VBlXgpAKr5eC0Owvc7EA4XJr+xrd00j3RKHlleg=
diff --git a/os-integration-test/etc/ssh/ssh_host_dsa_key b/os-integration-test/etc/ssh/ssh_host_dsa_key
deleted file mode 100644
index 2321da48..00000000
--- a/os-integration-test/etc/ssh/ssh_host_dsa_key
+++ /dev/null
@@ -1,21 +0,0 @@
------BEGIN OPENSSH PRIVATE KEY-----
-b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAABswAAAAdzc2gtZH
-NzAAAAgQDB5zSCWJEMYMspTanQt0tRR4JhDaDASR+RL84DfQX7Q1XuPG2YpHslB2G0D530
-4xPG7KdbpaTH3zZS8e6WfGKahtSX0+gUZWwpECin/UZdjDiXNz6XJ1ZEoCRLkid+yArXi6
-3BcDcNoPPNwyyMpvR9kNmGprh9G7qUtWDMYNul0wAAABUAjde0V4ohDO7KYPO4drK3AuIm
-vfEAAACBAMBFlUuR/RekINTvSbl1+5/iHYv4BULhCSYtTNuOMfidizLIYTDd0uzDxGZwf3
-SumhU6j74ew221mBK9C6y0m3v6lcOfa6M+QGrmaI2ciXDSmpxZYdT+RDpMcOZsURAY087F
-hxXbLSjCnBzfBfx8vJLOCaQs5qy6HAVm34z8YNeqAAAAgQCWuDOZWIaKghws6Pa6yoyZA9
-MMyhgV7HM6KQnAP0XQ+33dRsUVsiCgtgBL/uImkFtOJhrsHEA0pHOG4Cor9Hzyo4Ur57ln
-7kR2IUxhPKm4OyW3meH4gcAVBN1jYnmwZqRgF+7hi6tZNhEzr7VG6N92LpAQ+6Rao4QEAo
-m8DnT5yAAAAfDnggvs54IL7AAAAAdzc2gtZHNzAAAAgQDB5zSCWJEMYMspTanQt0tRR4Jh
-DaDASR+RL84DfQX7Q1XuPG2YpHslB2G0D5304xPG7KdbpaTH3zZS8e6WfGKahtSX0+gUZW
-wpECin/UZdjDiXNz6XJ1ZEoCRLkid+yArXi63BcDcNoPPNwyyMpvR9kNmGprh9G7qUtWDM
-YNul0wAAABUAjde0V4ohDO7KYPO4drK3AuImvfEAAACBAMBFlUuR/RekINTvSbl1+5/iHY
-v4BULhCSYtTNuOMfidizLIYTDd0uzDxGZwf3SumhU6j74ew221mBK9C6y0m3v6lcOfa6M+
-QGrmaI2ciXDSmpxZYdT+RDpMcOZsURAY087FhxXbLSjCnBzfBfx8vJLOCaQs5qy6HAVm34
-z8YNeqAAAAgQCWuDOZWIaKghws6Pa6yoyZA9MMyhgV7HM6KQnAP0XQ+33dRsUVsiCgtgBL
-/uImkFtOJhrsHEA0pHOG4Cor9Hzyo4Ur57ln7kR2IUxhPKm4OyW3meH4gcAVBN1jYnmwZq
-RgF+7hi6tZNhEzr7VG6N92LpAQ+6Rao4QEAom8DnT5yAAAABQcGgS2uRxbrfvcxPwmL/Mq
-JOcO3QAAABVoaWRldGFrZUByYWJiaXQubG9jYWwBAgME
------END OPENSSH PRIVATE KEY-----
diff --git a/os-integration-test/etc/ssh/ssh_host_dsa_key.pub b/os-integration-test/etc/ssh/ssh_host_dsa_key.pub
deleted file mode 100644
index f83c593b..00000000
--- a/os-integration-test/etc/ssh/ssh_host_dsa_key.pub
+++ /dev/null
@@ -1 +0,0 @@
-ssh-dss AAAAB3NzaC1kc3MAAACBAMHnNIJYkQxgyylNqdC3S1FHgmENoMBJH5EvzgN9BftDVe48bZikeyUHYbQPnfTjE8bsp1ulpMffNlLx7pZ8YpqG1JfT6BRlbCkQKKf9Rl2MOJc3PpcnVkSgJEuSJ37ICteLrcFwNw2g883DLIym9H2Q2YamuH0bupS1YMxg26XTAAAAFQCN17RXiiEM7spg87h2srcC4ia98QAAAIEAwEWVS5H9F6Qg1O9JuXX7n+Idi/gFQuEJJi1M244x+J2LMshhMN3S7MPEZnB/dK6aFTqPvh7DbbWYEr0LrLSbe/qVw59roz5AauZojZyJcNKanFlh1P5EOkxw5mxREBjTzsWHFdstKMKcHN8F/Hy8ks4JpCzmrLocBWbfjPxg16oAAACBAJa4M5lYhoqCHCzo9rrKjJkD0wzKGBXsczopCcA/RdD7fd1GxRWyIKC2AEv+4iaQW04mGuwcQDSkc4bgKiv0fPKjhSvnuWfuRHYhTGE8qbg7JbeZ4fiBwBUE3WNiebBmpGAX7uGLq1k2ETOvtUbo33YukBD7pFqjhAQCibwOdPnI
diff --git a/os-integration-test/etc/ssh/ssh_host_ecdsa_key b/os-integration-test/etc/ssh/ssh_host_ecdsa_key
deleted file mode 100644
index 01deac93..00000000
--- a/os-integration-test/etc/ssh/ssh_host_ecdsa_key
+++ /dev/null
@@ -1,9 +0,0 @@
------BEGIN OPENSSH PRIVATE KEY-----
-b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAAAaAAAABNlY2RzYS
-1zaGEyLW5pc3RwMjU2AAAACG5pc3RwMjU2AAAAQQTb2Qpge+BrGw6SKfi2lTzubUPS5FYg
-OGJBOV3IgNGJOP4q+lQZV4KQCq+XgtDsL3OxAOFya/sa3dNI90Sh5ZXoAAAAsOBC60DgQu
-tAAAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBNvZCmB74GsbDpIp
-+LaVPO5tQ9LkViA4YkE5XciA0Yk4/ir6VBlXgpAKr5eC0Owvc7EA4XJr+xrd00j3RKHlle
-gAAAAgQhtKq9f2GGDeivbuZ3tPKWtzabtWWkBBMCP79B1WIhcAAAAVaGlkZXRha2VAcmFi
-Yml0LmxvY2FsAQID
------END OPENSSH PRIVATE KEY-----
diff --git a/os-integration-test/etc/ssh/ssh_host_ecdsa_key.pub b/os-integration-test/etc/ssh/ssh_host_ecdsa_key.pub
deleted file mode 100644
index 46a65f1c..00000000
--- a/os-integration-test/etc/ssh/ssh_host_ecdsa_key.pub
+++ /dev/null
@@ -1 +0,0 @@
-ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBNvZCmB74GsbDpIp+LaVPO5tQ9LkViA4YkE5XciA0Yk4/ir6VBlXgpAKr5eC0Owvc7EA4XJr+xrd00j3RKHlleg=
diff --git a/os-integration-test/etc/ssh/ssh_host_ed25519_key b/os-integration-test/etc/ssh/ssh_host_ed25519_key
deleted file mode 100644
index 5a5980e5..00000000
--- a/os-integration-test/etc/ssh/ssh_host_ed25519_key
+++ /dev/null
@@ -1,7 +0,0 @@
------BEGIN OPENSSH PRIVATE KEY-----
-b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAAAMwAAAAtzc2gtZW
-QyNTUxOQAAACAg0uc6mInMIv6tF/4rYU5Tn/VBZ0Wp7HSzBqMQDLwPqgAAAJi6uxPeursT
-3gAAAAtzc2gtZWQyNTUxOQAAACAg0uc6mInMIv6tF/4rYU5Tn/VBZ0Wp7HSzBqMQDLwPqg
-AAAEDtQZ8yklhUquVEgewNF+kCFYADJ5vOQqrAfqWZ1XpiryDS5zqYicwi/q0X/ithTlOf
-9UFnRansdLMGoxAMvA+qAAAAFWhpZGV0YWtlQHJhYmJpdC5sb2NhbA==
------END OPENSSH PRIVATE KEY-----
diff --git a/os-integration-test/etc/ssh/ssh_host_ed25519_key.pub b/os-integration-test/etc/ssh/ssh_host_ed25519_key.pub
deleted file mode 100644
index 75cd3840..00000000
--- a/os-integration-test/etc/ssh/ssh_host_ed25519_key.pub
+++ /dev/null
@@ -1 +0,0 @@
-ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAICDS5zqYicwi/q0X/ithTlOf9UFnRansdLMGoxAMvA+q
diff --git a/os-integration-test/etc/ssh/ssh_host_rsa_key b/os-integration-test/etc/ssh/ssh_host_rsa_key
deleted file mode 100644
index 4ce54ec5..00000000
--- a/os-integration-test/etc/ssh/ssh_host_rsa_key
+++ /dev/null
@@ -1,27 +0,0 @@
------BEGIN OPENSSH PRIVATE KEY-----
-b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAABFwAAAAdzc2gtcn
-NhAAAAAwEAAQAAAQEAvQA/tTTYSOslnkBwHcQ3dQ+09adHECgRQk0y9+3PZv4EQaN48MzF
-hlqjLM8RUfKnoIVp3yHdo0uEZaDYWD5nyePSnOihIV0sx5gOoJdGhzligcQnhhC2EKoBOy
-u23NnT7Qx+ObgLxZYD28rsYD5WREp5Xj8Lv7BdQzuH3z+4l0CTOrSYok2dP+InqMBBiR+k
-k1UXOqcD6YeipIuzlrhqOceN07zON/dm9RGOY040So3mCKcn0TJ2wYB+bHLkimC6kgaiCy
-TWIGI/7yiwTuYDJYhAqCTPaaABoz6k4LdDr9+7mjTADRQseFf7VcKFT7kiSfbrUNSkGxKQ
-+Mw/w7EfgQAAA9Cj8Rn7o/EZ+wAAAAdzc2gtcnNhAAABAQC9AD+1NNhI6yWeQHAdxDd1D7
-T1p0cQKBFCTTL37c9m/gRBo3jwzMWGWqMszxFR8qeghWnfId2jS4RloNhYPmfJ49Kc6KEh
-XSzHmA6gl0aHOWKBxCeGELYQqgE7K7bc2dPtDH45uAvFlgPbyuxgPlZESnlePwu/sF1DO4
-ffP7iXQJM6tJiiTZ0/4ieowEGJH6STVRc6pwPph6Kki7OWuGo5x43TvM4392b1EY5jTjRK
-jeYIpyfRMnbBgH5scuSKYLqSBqILJNYgYj/vKLBO5gMliECoJM9poAGjPqTgt0Ov37uaNM
-ANFCx4V/tVwoVPuSJJ9utQ1KQbEpD4zD/DsR+BAAAAAwEAAQAAAQEAhfWOMi6ReiWJFUCQ
-9tgjgooudcspmC7+BKNZE9dvoI08kRV/3BUXj6HgdBsUKKQ34ZOONcP4JwyYe7vke69Hux
-YKKoLL6izzV0jUXUi7iY7H3jgc124yzV7h3oGea6zNBABN2zUyysoIVBnhLlogpOiwW3eO
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-iG8ShaFRD32i5rILVI+UEp7NKi48Xm36LLbxgJZwNGsF4DGcimMfdjyHy7J1aB6BleuKUX
-iHRQFus26iU6jW7pqSIG9UAEONxO2smv8AjpU9t6oWmWj91osiuykMWcKrnKYgR7tB+BsS
-hIVqJagkn1jdwAAACBAOkRQheAz7c8hDnz3nnTBF0fACL8/yH4igChrYA29L1EdKgH1FwW
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-GY1MANtFh/b2xWgSPRasbTg3L3LEk2I3WiQPcARTLv9O02ZNrwBSPJ33BF5GEkUcK13WI3
-P3ns3YHA031EPwQrF1T0iHN024EkDl0KKUMjobSOeoC1RmXHuJ6Do3lHHNxlvrkIKw3YxV
-92rSZ1v9fq2p3xnKAQAAABVoaWRldGFrZUByYWJiaXQubG9jYWwBAgME
------END OPENSSH PRIVATE KEY-----
diff --git a/os-integration-test/etc/ssh/ssh_host_rsa_key.pub b/os-integration-test/etc/ssh/ssh_host_rsa_key.pub
deleted file mode 100644
index 30600c30..00000000
--- a/os-integration-test/etc/ssh/ssh_host_rsa_key.pub
+++ /dev/null
@@ -1 +0,0 @@
-ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQC9AD+1NNhI6yWeQHAdxDd1D7T1p0cQKBFCTTL37c9m/gRBo3jwzMWGWqMszxFR8qeghWnfId2jS4RloNhYPmfJ49Kc6KEhXSzHmA6gl0aHOWKBxCeGELYQqgE7K7bc2dPtDH45uAvFlgPbyuxgPlZESnlePwu/sF1DO4ffP7iXQJM6tJiiTZ0/4ieowEGJH6STVRc6pwPph6Kki7OWuGo5x43TvM4392b1EY5jTjRKjeYIpyfRMnbBgH5scuSKYLqSBqILJNYgYj/vKLBO5gMliECoJM9poAGjPqTgt0Ov37uaNMANFCx4V/tVwoVPuSJJ9utQ1KQbEpD4zD/DsR+B
diff --git a/os-integration-test/generate-keys.sh b/os-integration-test/generate-keys.sh
new file mode 100644
index 00000000..dc507754
--- /dev/null
+++ b/os-integration-test/generate-keys.sh
@@ -0,0 +1,20 @@
+#!/bin/bash
+# Generate key pairs and known_hosts.
+# For GitHub Codespaces, set SSH_PORT=2222
+
+set -ex
+mkdir -m 700 -vp ~/.ssh
+
+# user keys
+ssh-keygen -t ecdsa -N '' -C '' -f ~/.ssh/id_ecdsa
+ssh-keygen -t ecdsa -N gradle -C '' -f ~/.ssh/id_ecdsa_pass
+
+# authorized_keys
+cat ~/.ssh/id_*.pub > ~/.ssh/authorized_keys
+
+# known_hosts
+ssh -v \
+  -o StrictHostKeyChecking=accept-new \
+  -o HostKeyAlgorithms=ecdsa-sha2-nistp256 \
+  -p "${SSH_PORT:-22}" \
+  localhost true
diff --git a/os-integration-test/run-sshd.sh b/os-integration-test/run-sshd.sh
deleted file mode 100755
index 831e3b17..00000000
--- a/os-integration-test/run-sshd.sh
+++ /dev/null
@@ -1,10 +0,0 @@
-#!/bin/bash -xe
-
-exec docker run --rm -p 22:22 \
-  -e "SSH_HOST_DSA_KEY=$(cat etc/ssh/ssh_host_dsa_key)" \
-  -e "SSH_HOST_RSA_KEY=$(cat etc/ssh/ssh_host_rsa_key)" \
-  -e "SSH_HOST_ECDSA_KEY=$(cat etc/ssh/ssh_host_ecdsa_key)" \
-  -e "SSH_HOST_ED25519_KEY=$(cat etc/ssh/ssh_host_ed25519_key)" \
-  -e "SSH_AUTHORIZED_KEYS=$(cat etc/ssh/id_rsa.pub etc/ssh/id_rsa_pass.pub etc/ssh/id_ecdsa.pub)" \
-  --name sshd \
-  int128/sshd
diff --git a/os-integration-test/src/main/groovy/org/hidetake/groovy/ssh/test/os/Fixture.groovy b/os-integration-test/src/main/groovy/org/hidetake/groovy/ssh/test/os/Fixture.groovy
index e43576d3..45d3d239 100644
--- a/os-integration-test/src/main/groovy/org/hidetake/groovy/ssh/test/os/Fixture.groovy
+++ b/os-integration-test/src/main/groovy/org/hidetake/groovy/ssh/test/os/Fixture.groovy
@@ -16,27 +16,20 @@ class Fixture {
         service.remotes {
             Default {
                 host = 'localhost'
-                port = 22
-                user = 'tester'
-                identity = new File("etc/ssh/id_rsa")
+                port = System.getenv('SSH_PORT') as int
+                user = System.properties['user.name']
+                identity = new File("${System.properties['user.home']}/.ssh/id_ecdsa")
                 knownHosts = addHostKey(new File("build/known_hosts"))
             }
         }
         service.remotes {
-            DefaultWithECDSAKey {
-                host = service.remotes.Default.host
-                port = service.remotes.Default.port
-                user = service.remotes.Default.user
-                identity = new File("etc/ssh/id_ecdsa")
-                knownHosts = service.remotes.Default.knownHosts
-            }
             DefaultWithPassphrase {
                 host = service.remotes.Default.host
                 port = service.remotes.Default.port
                 user = service.remotes.Default.user
                 knownHosts = service.remotes.Default.knownHosts
 
-                identity = new File("etc/ssh/id_rsa_pass")
+                identity = new File("${System.properties['user.home']}/.ssh/id_ecdsa_pass")
                 passphrase = 'gradle'
             }
             DefaultWithOpenSSHKnownHosts {
@@ -45,7 +38,7 @@ class Fixture {
                 user = service.remotes.Default.user
                 identity = service.remotes.Default.identity
 
-                knownHosts = new File("etc/ssh/known_hosts")
+                knownHosts = new File("${System.properties['user.home']}/.ssh/known_hosts")
             }
             DefaultWithAgent {
                 host = service.remotes.Default.host
diff --git a/os-integration-test/src/test/groovy/org/hidetake/groovy/ssh/test/os/UserAuthenticationSpec.groovy b/os-integration-test/src/test/groovy/org/hidetake/groovy/ssh/test/os/UserAuthenticationSpec.groovy
index 85ef223e..5c2e7ab7 100644
--- a/os-integration-test/src/test/groovy/org/hidetake/groovy/ssh/test/os/UserAuthenticationSpec.groovy
+++ b/os-integration-test/src/test/groovy/org/hidetake/groovy/ssh/test/os/UserAuthenticationSpec.groovy
@@ -37,23 +37,7 @@ class UserAuthenticationSpec extends Specification {
         ssh.settings.extensions.add(UserManagementExtension)
     }
 
-    def 'should authenticate by ECDSA key'() {
-        given:
-        def x = randomInt()
-        def y = randomInt()
-
-        when:
-        def r = ssh.run {
-            session(ssh.remotes.DefaultWithECDSAKey) {
-                execute "expr $x + $y"
-            }
-        } as int
-
-        then:
-        r == (x + y)
-    }
-
-    def 'should authenticate by pass-phrased RSA key'() {
+    def 'should authenticate by pass-phrased key'() {
         given:
         def x = randomInt()
         def y = randomInt()