diff --git a/.github/workflows/ruby.yml b/.github/workflows/ruby.yml
index 94f6d24..ffde29a 100644
--- a/.github/workflows/ruby.yml
+++ b/.github/workflows/ruby.yml
@@ -42,7 +42,7 @@ jobs:
     - name: Run tests
       run: bundle exec rake --trace
       env:
-        REFORGE_INTEGRATION_TEST_API_KEY: ${{ secrets.REFORGE_INTEGRATION_TEST_API_KEY }}
+        REFORGE_INTEGRATION_TEST_SDK_KEY: ${{ secrets.REFORGE_INTEGRATION_TEST_SDK_KEY }}
         PREFAB_INTEGRATION_TEST_ENCRYPTION_KEY: c87ba22d8662282abe8a0e4651327b579cb64a454ab0f4c170b45b15f049a221
         NOT_A_NUMBER: "abcd"
         IS_A_NUMBER: "1234"
diff --git a/test/integration_test.rb b/test/integration_test.rb
index 47d28dc..c72c972 100644
--- a/test/integration_test.rb
+++ b/test/integration_test.rb
@@ -134,7 +134,7 @@ def base_client_options
       prefab_config_classpath_dir: 'test',
       prefab_envs: ['unit_tests'],
       prefab_datasources: Reforge::Options::DATASOURCES::ALL,
-      sdk_key: ENV['REFORGE_INTEGRATION_TEST_API_KEY'],
+      sdk_key: ENV['REFORGE_INTEGRATION_TEST_SDK_KEY'],
       sources: [
         'https://belt.staging-prefab.cloud',
         'https://suspenders.staging-prefab.cloud',
diff --git a/test/support/common_helpers.rb b/test/support/common_helpers.rb
index c46862d..23816fc 100644
--- a/test/support/common_helpers.rb
+++ b/test/support/common_helpers.rb
@@ -30,7 +30,14 @@ def teardown
     if $stderr != $oldstderr && $stderr.respond_to?(:string) && !$stderr.string.empty?
       # we ignore 2.X because of the number of `instance variable @xyz not initialized` warnings
       if !RUBY_VERSION.start_with?('2.')
-        raise "Unexpected stderr. Handle stderr with assert_stderr\n\n#{$stderr.string}"
+        # Filter out ld-eventsource frozen string literal warnings in Ruby 3.4+
+        stderr_lines = $stderr.string.split("\n").reject do |line|
+          line.include?('ld-eventsource') && line.include?('literal string will be frozen in the future')
+        end
+
+        if !stderr_lines.empty?
+          raise "Unexpected stderr. Handle stderr with assert_stderr\n\n#{stderr_lines.join("\n")}"
+        end
       end
     end
 
diff --git a/test/test_sse_config_client.rb b/test/test_sse_config_client.rb
index 51bd6a3..049000c 100644
--- a/test/test_sse_config_client.rb
+++ b/test/test_sse_config_client.rb
@@ -10,7 +10,7 @@ def test_client
       'https://belt.staging-prefab.cloud/'
     ]
 
-    options = Reforge::Options.new(sources: sources, sdk_key: ENV.fetch('REFORGE_INTEGRATION_TEST_API_KEY', nil))
+    options = Reforge::Options.new(sources: sources, sdk_key: ENV.fetch('REFORGE_INTEGRATION_TEST_SDK_KEY', nil))
 
     config_loader = OpenStruct.new(highwater_mark: 4)
 
@@ -40,7 +40,7 @@ def test_failing_over
       'https://api.staging-prefab.cloud/'
     ]
 
-    prefab_options = Reforge::Options.new(sources: sources, sdk_key: ENV.fetch('REFORGE_INTEGRATION_TEST_API_KEY', nil))
+    prefab_options = Reforge::Options.new(sources: sources, sdk_key: ENV.fetch('REFORGE_INTEGRATION_TEST_SDK_KEY', nil))
 
     config_loader = OpenStruct.new(highwater_mark: 4)