diff --git a/.github/workflows/FreeBSD.yml b/.github/workflows/FreeBSD.yml
index 316da402..40da24cf 100644
--- a/.github/workflows/FreeBSD.yml
+++ b/.github/workflows/FreeBSD.yml
@@ -24,10 +24,12 @@ jobs:
            CA_ECDSA: ""
            CA: ""
            CA_EMAIL: ""
+           TEST_PREFERRED_CHAIN: Fake LE Root X2
          - TEST_ACME_Server: "ZeroSSL.com"
            CA_ECDSA: "ZeroSSL ECC Domain Secure Site CA"
            CA: "ZeroSSL RSA Domain Secure Site CA"
            CA_EMAIL: "githubtest@acme.sh"
+           TEST_PREFERRED_CHAIN: ""
     runs-on: macos-10.15
     env:
       TEST_LOCAL: 1
@@ -35,6 +37,7 @@ jobs:
       CA_ECDSA: ${{ matrix.CA_ECDSA }}
       CA: ${{ matrix.CA }}
       CA_EMAIL: ${{ matrix.CA_EMAIL }}
+      TEST_PREFERRED_CHAIN: ${{ matrix.TEST_PREFERRED_CHAIN }}
     steps:
     - uses: actions/checkout@v2
     - uses: vmactions/cf-tunnel@v0.0.3
@@ -48,7 +51,7 @@ jobs:
       run: cd .. && git clone https://github.com/acmesh-official/acmetest.git  && cp -r acme.sh acmetest/
     - uses: vmactions/freebsd-vm@v0.1.5
       with:
-        envs: 'TEST_LOCAL TestingDomain TEST_ACME_Server CA_ECDSA CA CA_EMAIL'
+        envs: 'TEST_LOCAL TestingDomain TEST_ACME_Server CA_ECDSA CA CA_EMAIL TEST_PREFERRED_CHAIN'
         nat: |
           "8080": "80"
         prepare: pkg install -y socat curl
diff --git a/.github/workflows/Linux.yml b/.github/workflows/Linux.yml
index 7e7eba87..ba81391d 100644
--- a/.github/workflows/Linux.yml
+++ b/.github/workflows/Linux.yml
@@ -24,6 +24,7 @@ jobs:
     runs-on: ubuntu-latest
     env:
       TEST_LOCAL: 1
+      TEST_PREFERRED_CHAIN: Fake LE Root X2
     steps:
     - uses: actions/checkout@v2
     - name: Clone acmetest
diff --git a/.github/workflows/MacOS.yml b/.github/workflows/MacOS.yml
index 85ec7527..db87db23 100644
--- a/.github/workflows/MacOS.yml
+++ b/.github/workflows/MacOS.yml
@@ -24,10 +24,12 @@ jobs:
            CA_ECDSA: ""
            CA: ""
            CA_EMAIL: ""
+           TEST_PREFERRED_CHAIN: Fake LE Root X2
          - TEST_ACME_Server: "ZeroSSL.com"
            CA_ECDSA: "ZeroSSL ECC Domain Secure Site CA"
            CA: "ZeroSSL RSA Domain Secure Site CA"
            CA_EMAIL: "githubtest@acme.sh"
+           TEST_PREFERRED_CHAIN: ""
     runs-on: macos-latest
     env:
       TEST_LOCAL: 1
@@ -35,6 +37,7 @@ jobs:
       CA_ECDSA: ${{ matrix.CA_ECDSA }}
       CA: ${{ matrix.CA }}
       CA_EMAIL: ${{ matrix.CA_EMAIL }}
+      TEST_PREFERRED_CHAIN: ${{ matrix.TEST_PREFERRED_CHAIN }}
     steps:
     - uses: actions/checkout@v2
     - name: Install tools
diff --git a/.github/workflows/Solaris.yml b/.github/workflows/Solaris.yml
index 723a1237..56c53870 100644
--- a/.github/workflows/Solaris.yml
+++ b/.github/workflows/Solaris.yml
@@ -24,10 +24,12 @@ jobs:
            CA_ECDSA: ""
            CA: ""
            CA_EMAIL: ""
+           TEST_PREFERRED_CHAIN: Fake LE Root X2
          - TEST_ACME_Server: "ZeroSSL.com"
            CA_ECDSA: "ZeroSSL ECC Domain Secure Site CA"
            CA: "ZeroSSL RSA Domain Secure Site CA"
            CA_EMAIL: "githubtest@acme.sh"
+           TEST_PREFERRED_CHAIN: ""
     runs-on: macos-10.15
     env:
       TEST_LOCAL: 1
@@ -35,6 +37,7 @@ jobs:
       CA_ECDSA: ${{ matrix.CA_ECDSA }}
       CA: ${{ matrix.CA }}
       CA_EMAIL: ${{ matrix.CA_EMAIL }}
+      TEST_PREFERRED_CHAIN: ${{ matrix.TEST_PREFERRED_CHAIN }}
     steps:
     - uses: actions/checkout@v2
     - uses: vmactions/cf-tunnel@v0.0.3
@@ -48,7 +51,7 @@ jobs:
       run: cd .. && git clone https://github.com/acmesh-official/acmetest.git  && cp -r acme.sh acmetest/
     - uses: vmactions/solaris-vm@v0.0.3
       with:
-        envs: 'TEST_LOCAL TestingDomain TEST_ACME_Server CA_ECDSA CA CA_EMAIL'
+        envs: 'TEST_LOCAL TestingDomain TEST_ACME_Server CA_ECDSA CA CA_EMAIL TEST_PREFERRED_CHAIN'
         nat: |
           "8080": "80"
         prepare: pkgutil -y -i socat curl
diff --git a/.github/workflows/Ubuntu.yml b/.github/workflows/Ubuntu.yml
index af74965a..e5fe2901 100644
--- a/.github/workflows/Ubuntu.yml
+++ b/.github/workflows/Ubuntu.yml
@@ -24,10 +24,12 @@ jobs:
            CA_ECDSA: ""
            CA: ""
            CA_EMAIL: ""
+           TEST_PREFERRED_CHAIN: Fake LE Root X2
          - TEST_ACME_Server: "ZeroSSL.com"
            CA_ECDSA: "ZeroSSL ECC Domain Secure Site CA"
            CA: "ZeroSSL RSA Domain Secure Site CA"
            CA_EMAIL: "githubtest@acme.sh"
+           TEST_PREFERRED_CHAIN: ""
 
     runs-on: ubuntu-latest
     env:
@@ -37,6 +39,7 @@ jobs:
       CA: ${{ matrix.CA }}
       CA_EMAIL: ${{ matrix.CA_EMAIL }}
       NO_ECC_384: ${{ matrix.NO_ECC_384 }}
+      TEST_PREFERRED_CHAIN: ${{ matrix.TEST_PREFERRED_CHAIN }}
     steps:
     - uses: actions/checkout@v2
     - name: Install tools
diff --git a/.github/workflows/Windows.yml b/.github/workflows/Windows.yml
index dd147e85..f2f687f2 100644
--- a/.github/workflows/Windows.yml
+++ b/.github/workflows/Windows.yml
@@ -24,10 +24,12 @@ jobs:
            CA_ECDSA: ""
            CA: ""
            CA_EMAIL: ""
+           TEST_PREFERRED_CHAIN: Fake LE Root X2
          - TEST_ACME_Server: "ZeroSSL.com"
            CA_ECDSA: "ZeroSSL ECC Domain Secure Site CA"
            CA: "ZeroSSL RSA Domain Secure Site CA"
            CA_EMAIL: "githubtest@acme.sh"
+           TEST_PREFERRED_CHAIN: ""
     runs-on: windows-latest
     env:
       TEST_ACME_Server: ${{ matrix.TEST_ACME_Server }}
@@ -37,6 +39,7 @@ jobs:
       TEST_LOCAL: 1
       #The 80 port is used by Windows server, we have to use a custom port, tunnel will also use this port.
       Le_HTTPPort: 8888
+      TEST_PREFERRED_CHAIN: ${{ matrix.TEST_PREFERRED_CHAIN }}
     steps:
     - name: Set git to use LF
       run: |