diff --git a/cookbooks/aws-parallelcluster-environment/spec/unit/resources/efs_spec.rb b/cookbooks/aws-parallelcluster-environment/spec/unit/resources/efs_spec.rb
index 1fc4c19ce..279c16159 100644
--- a/cookbooks/aws-parallelcluster-environment/spec/unit/resources/efs_spec.rb
+++ b/cookbooks/aws-parallelcluster-environment/spec/unit/resources/efs_spec.rb
@@ -156,7 +156,6 @@ def mock_already_installed(package, expected_version, installed)
   end
 
   for_oses([
-    %w(centos 7),
     %w(redhat 8),
     %w(rocky 8),
     %w(redhat 9),
diff --git a/cookbooks/aws-parallelcluster-environment/spec/unit/resources/lustre_setup_spec.rb b/cookbooks/aws-parallelcluster-environment/spec/unit/resources/lustre_setup_spec.rb
index cffa7e906..84bda2827 100644
--- a/cookbooks/aws-parallelcluster-environment/spec/unit/resources/lustre_setup_spec.rb
+++ b/cookbooks/aws-parallelcluster-environment/spec/unit/resources/lustre_setup_spec.rb
@@ -34,134 +34,6 @@ def self.nothing(chef_run)
     end
   end
 
-  context "on centos 7.4 or lower" do
-    cached(:chef_run) do
-      runner = runner(
-        platform: 'centos', version: '7',
-        step_into: ['lustre']
-      ) do |node|
-        node.automatic['platform_version'] = "7.4"
-      end
-      Lustre.setup(runner)
-    end
-
-    it 'can not install lustre' do
-      is_expected.to write_log("Unsupported version of Centos, 7.4, supported versions are >= 7.5")
-        .with(level: :warn)
-    end
-  end
-
-  context "on centos 7.5" do
-    cached(:chef_run) do
-      runner = runner(
-        platform: 'centos', version: '7',
-        step_into: ['lustre']
-      ) do |node|
-        node.automatic['platform_version'] = "7.5"
-        node.override['cluster']['sources_dir'] = "srcdir"
-      end
-      Lustre.setup(runner)
-    end
-
-    it 'installs kmod-lustre-client from downloaded rpm' do
-      is_expected.to create_if_missing_remote_file("srcdir/kmod-lustre-client-2.10.5.x86_64.rpm")
-        .with(source: "https://downloads.whamcloud.com/public/lustre/lustre-2.10.5/el7.5.1804/client/RPMS/x86_64/kmod-lustre-client-2.10.5-1.el7.x86_64.rpm")
-        .with(mode: '0644')
-        .with(retries: 3)
-        .with(retry_delay: 5)
-
-      is_expected.to install_package('lustre_kmod')
-        .with(source: "srcdir/kmod-lustre-client-2.10.5.x86_64.rpm")
-    end
-
-    it 'installs lustre-client from downloaded rpm' do
-      is_expected.to create_if_missing_remote_file("srcdir/lustre-client-2.10.5.x86_64.rpm")
-        .with(source: "https://downloads.whamcloud.com/public/lustre/lustre-2.10.5/el7.5.1804/client/RPMS/x86_64/lustre-client-2.10.5-1.el7.x86_64.rpm")
-        .with(mode: '0644')
-        .with(retries: 3)
-        .with(retry_delay: 5)
-
-      is_expected.to install_package('lustre_client')
-        .with(source: "srcdir/lustre-client-2.10.5.x86_64.rpm")
-    end
-
-    it 'installs kernel module lnet' do
-      is_expected.to install_kernel_module("lnet")
-    end
-  end
-
-  context "on centos 7.6" do
-    cached(:chef_run) do
-      runner = runner(
-        platform: 'centos', version: '7',
-        step_into: ['lustre']
-      ) do |node|
-        node.automatic['platform_version'] = "7.6"
-        node.override['cluster']['sources_dir'] = "srcdir"
-      end
-      Lustre.setup(runner)
-    end
-
-    it 'installs kmod-lustre-client from downloaded rpm' do
-      is_expected.to create_if_missing_remote_file("srcdir/kmod-lustre-client-2.10.8.x86_64.rpm")
-        .with(source: "https://downloads.whamcloud.com/public/lustre/lustre-2.10.8/el7/client/RPMS/x86_64/kmod-lustre-client-2.10.8-1.el7.x86_64.rpm")
-        .with(mode: '0644')
-        .with(retries: 3)
-        .with(retry_delay: 5)
-
-      is_expected.to install_package('lustre_kmod')
-        .with(source: "srcdir/kmod-lustre-client-2.10.8.x86_64.rpm")
-    end
-
-    it 'installs lustre-client from downloaded rpm' do
-      is_expected.to create_if_missing_remote_file("srcdir/lustre-client-2.10.8.x86_64.rpm")
-        .with(source: "https://downloads.whamcloud.com/public/lustre/lustre-2.10.8/el7/client/RPMS/x86_64/lustre-client-2.10.8-1.el7.x86_64.rpm")
-        .with(mode: '0644')
-        .with(retries: 3)
-        .with(retry_delay: 5)
-
-      is_expected.to install_package('lustre_client')
-        .with(source: "srcdir/lustre-client-2.10.8.x86_64.rpm")
-    end
-
-    it 'installs kernel module lnet' do
-      is_expected.to install_kernel_module("lnet")
-    end
-  end
-
-  context "on centos 7.7 or higher" do
-    cached(:chef_run) do
-      runner = runner(
-        platform: 'centos', version: '7',
-        step_into: ['lustre']
-      ) do |node|
-        node.automatic['platform_version'] = "7.7"
-      end
-      Lustre.setup(runner)
-    end
-
-    stubs_for_resource('lustre') do |res|
-      allow(res).to receive(:find_centos_minor_version).and_return('minor')
-    end
-
-    it 'installs lustre packages from repository and installs kernel module lnet' do
-      is_expected.to create_yum_repository("aws-fsx")
-        .with(baseurl: 'https://fsx-lustre-client-repo.s3.amazonaws.com/el/7.minor/x86_64/')
-        .with(gpgkey: 'https://fsx-lustre-client-repo-public-keys.s3.amazonaws.com/fsx-rpm-public-key.asc')
-        .with(retries: 3)
-        .with(retry_delay: 5)
-
-      is_expected.to run_execute('yum-config-manager_skip_if_unavail')
-        .with(command: "yum-config-manager --setopt=\*.skip_if_unavailable=1 --save")
-
-      is_expected.to install_package(%w(kmod-lustre-client lustre-client dracut))
-        .with(retries: 3)
-        .with(retry_delay: 5)
-
-      is_expected.to install_kernel_module("lnet")
-    end
-  end
-
   [%w(redhat RHEL), ["rocky", "Rocky Linux"]].each do |platform, platform_string|
     context "on #{platform} lower than 8.2" do
       cached(:chef_run) do
@@ -290,117 +162,3 @@ def self.nothing(chef_run)
     end
   end
 end
-
-describe 'lustre:find_centos_minor_version' do
-  context "centos version is not 7" do
-    cached(:chef_run) do
-      runner = runner(platform: 'centos', version: '7', step_into: ['lustre']) do |node|
-        node.automatic['platform_version'] = "8"
-      end
-      Lustre.setup(runner)
-    end
-
-    it 'raises error' do
-      expect { chef_run }.to(raise_error do |error|
-        expect(error).to be_a(Exception)
-        # This can not happen because the resource is defined only for Centos7
-        # expect(error.message).to include("CentOS version 8 not supported")
-        expect(error.message).to include("Cannot find a resource for lustre on centos version 8")
-      end)
-    end
-  end
-
-  context('on centos 7') do
-    context "kernel release does not match expected format" do
-      cached(:chef_run) do
-        runner = runner(
-          platform: 'centos', version: '7',
-          step_into: ['lustre']
-        ) do |node|
-          node.automatic['platform_version'] = "7.7"
-          node.override['cluster']['kernel_release'] = 'unexpected.format'
-        end
-        Lustre.setup(runner)
-      end
-
-      it 'raises error' do
-        expect { chef_run }.to(raise_error do |error|
-          expect(error).to be_a(Exception)
-          expect(error.message).to include("Unable to retrieve the kernel patch version from unexpected.format.")
-        end)
-      end
-    end
-
-    context "kernel release below 3.10.0-1062" do
-      cached(:chef_run) do
-        runner = runner(
-          platform: 'centos', version: '7',
-          step_into: ['lustre']
-        ) do |node|
-          node.automatic['platform_version'] = "7.7"
-          node.override['cluster']['kernel_release'] = '3.10.0-1061.8.2.el7.x86_64'
-        end
-        Lustre.setup(runner)
-      end
-
-      it 'uses empty minor version' do
-        is_expected.to create_yum_repository("aws-fsx")
-          .with(baseurl: 'https://fsx-lustre-client-repo.s3.amazonaws.com/el/7./x86_64/')
-      end
-    end
-
-    context "kernel release 3.10.0-1062 to 3.10.0-1126" do
-      cached(:chef_run) do
-        runner = runner(
-          platform: 'centos', version: '7',
-          step_into: ['lustre']
-        ) do |node|
-          node.automatic['platform_version'] = "7.7"
-          node.override['cluster']['kernel_release'] = '3.10.0-1062.8.2.el7.x86_64'
-        end
-        Lustre.setup(runner)
-      end
-
-      it 'uses minor version 7' do
-        is_expected.to create_yum_repository("aws-fsx")
-          .with(baseurl: 'https://fsx-lustre-client-repo.s3.amazonaws.com/el/7.7/x86_64/')
-      end
-    end
-
-    context "kernel release 3.10.0-1127 to 3.10.0-1167" do
-      cached(:chef_run) do
-        runner = runner(
-          platform: 'centos', version: '7',
-          step_into: ['lustre']
-        ) do |node|
-          node.automatic['platform_version'] = "7.7"
-          node.override['cluster']['kernel_release'] = '3.10.0-1127.8.2.el7.x86_64'
-        end
-        Lustre.setup(runner)
-      end
-
-      it 'uses minor version 7' do
-        is_expected.to create_yum_repository("aws-fsx")
-          .with(baseurl: 'https://fsx-lustre-client-repo.s3.amazonaws.com/el/7.8/x86_64/')
-      end
-    end
-
-    context "kernel from 3.10.0-1168 on" do
-      cached(:chef_run) do
-        runner = runner(
-          platform: 'centos', version: '7',
-          step_into: ['lustre']
-        ) do |node|
-          node.automatic['platform_version'] = "7.7"
-          node.override['cluster']['kernel_release'] = '3.10.0-1168.8.2.el7.x86_64'
-        end
-        Lustre.setup(runner)
-      end
-
-      it 'uses minor version 7' do
-        is_expected.to create_yum_repository("aws-fsx")
-          .with(baseurl: 'https://fsx-lustre-client-repo.s3.amazonaws.com/el/7.9/x86_64/')
-      end
-    end
-  end
-end