🐛 Fix JRuby env override spec

Author: pboling

CHANGELOG.md

@@ -33,6 +33,9 @@ Please file a bug if you notice a violation of semantic versioning.
 
 ### Fixed
 
+- Made the ENV-driven configuration spec explicitly remove nil-valued child
+  process overrides so JRuby 9.2 does not inherit `KETTLE_TEST_SILENT=false`.
+
 ### Security
 
 ## [2.0.2] - 2026-06-01

spec/kettle/test_spec.rb

@@ -10,6 +10,15 @@
   include_context "with stubbed env"
 
   def isolated_kettle_test_snapshot(env = {})
+    child_env = ENV.to_hash
+    env.each do |key, value|
+      if value.nil?
+        child_env.delete(key)
+      else
+        child_env[key] = value
+      end
+    end
+
     code = <<~RUBY
       require "bundler/setup"
       require "json"
@@ -30,7 +39,7 @@ def isolated_kettle_test_snapshot(env = {})
     RUBY
 
     stdout, stderr, status = Open3.capture3(
-      env,
+      child_env,
       RbConfig.ruby,
       "-e",
       code,