diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 062d03d..934bdc6 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -34,3 +34,10 @@ jobs:
       - uses: actions/checkout@v3
       - run: docker-compose build rspec-3.1
       - run: docker-compose run rspec-3.1
+
+  build-3-2:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - run: docker-compose build rspec-3.2
+      - run: docker-compose run rspec-3.2
diff --git a/docker-compose.yaml b/docker-compose.yaml
index 9adb034..d6ab92a 100644
--- a/docker-compose.yaml
+++ b/docker-compose.yaml
@@ -27,4 +27,11 @@ services:
         BASE_IMAGE: ruby:3.1
     volumes:
       - .:/app
+  rspec-3.2:
+    build:
+      context: .
+      args:
+        BASE_IMAGE: ruby:3.2
+    volumes:
+      - .:/app
     entrypoint: bundle exec rspec
diff --git a/k8s-ruby.gemspec b/k8s-ruby.gemspec
index e8541c0..742bb5a 100644
--- a/k8s-ruby.gemspec
+++ b/k8s-ruby.gemspec
@@ -21,7 +21,7 @@ Gem::Specification.new do |spec|
   spec.bindir        = "bin"
   spec.executables   = []
   spec.require_paths = ["lib"]
-  spec.required_ruby_version = spec.required_ruby_version = [">= 2.4", "< 3.2"]
+  spec.required_ruby_version = spec.required_ruby_version = [">= 2.4", "<= 3.2.2"]
 
   spec.add_runtime_dependency "excon", "~> 0.71"
   spec.add_runtime_dependency "dry-struct", "<= 1.6.0"
diff --git a/spec/k8s/client_spec.rb b/spec/k8s/client_spec.rb
index a035aa7..ea194ac 100644
--- a/spec/k8s/client_spec.rb
+++ b/spec/k8s/client_spec.rb
@@ -34,7 +34,6 @@
 
     subject { described_class }
     context 'from KUBE_CA/KUBE_SERVER/KUBE_TOKEN variables' do
-
       let(:server) { "localhost" }
       let(:env) { { 'KUBE_TOKEN' => token, 'KUBE_CA' => ca, 'KUBE_SERVER' => server } }
 
@@ -125,11 +124,16 @@
 
     context 'from default file locations' do
       before do
-        stub_const("ENV", {}) # ensure ENV['KUBECONFIG'] is not used
-        expect(File).to receive(:exist?).with(default_kubeconfig_path).and_return(false)
-        expect(File).to receive(:exist?).with('/etc/kubernetes/admin.conf').and_return(false)
-        expect(File).to receive(:exist?).with('/etc/kubernetes/kubelet.conf').and_return(true)
-        expect(File).to receive(:readable?).with('/etc/kubernetes/kubelet.conf').and_return(true)
+        stub_const("ENV", { 'KUBECONFIG' => nil }) # ensure ENV['KUBECONFIG'] is not used
+
+        allow(File).to receive(:read).and_call_original
+        allow(File).to receive(:exist?).and_call_original
+        allow(File).to receive(:readable?).and_call_original
+
+        allow(File).to receive(:exist?).with(default_kubeconfig_path).and_return(false)
+        allow(File).to receive(:exist?).with('/etc/kubernetes/admin.conf').and_return(false)
+        allow(File).to receive(:exist?).with('/etc/kubernetes/kubelet.conf').and_return(true)
+        allow(File).to receive(:readable?).with('/etc/kubernetes/kubelet.conf').and_return(true)
       end
 
       it 'loads a file if found' do