diff --git a/build_tests/library/override_arcmd.rb b/build_tests/library/override_arcmd.rb
new file mode 100644
index 0000000..29e39d3
--- /dev/null
+++ b/build_tests/library/override_arcmd.rb
@@ -0,0 +1,4 @@
+Rscons::Environment.new(echo: :command) do |env|
+  env["ARCMD"] = %w[ar rcf ${_TARGET} ${_SOURCES}]
+  env.Library("lib.a", Dir["*.c"].sort)
+end
diff --git a/spec/build_tests_spec.rb b/spec/build_tests_spec.rb
index d60f406..b8e87c5 100644
--- a/spec/build_tests_spec.rb
+++ b/spec/build_tests_spec.rb
@@ -960,4 +960,13 @@ EOF
       expect(result.stderr).to match /unknown input file type: "foo.xyz"/
     end
   end
+
+  context "Library builder" do
+    it "allows overriding ARCMD construction variable" do
+      test_dir("library")
+      result = run_test(rsconsfile: "override_arcmd.rb")
+      expect(result.stderr).to eq ""
+      expect(lines(result.stdout)).to include "ar rcf lib.a one.o three.o two.o"
+    end
+  end
 end
diff --git a/spec/rscons/builders/library_spec.rb b/spec/rscons/builders/library_spec.rb
deleted file mode 100644
index 6885322..0000000
--- a/spec/rscons/builders/library_spec.rb
+++ /dev/null
@@ -1,28 +0,0 @@
-module Rscons
-  module Builders
-    describe Library do
-      let(:env) {Environment.new}
-      subject {Library.new}
-
-      it "supports overriding AR construction variable" do
-        expect(subject).to receive(:standard_build).with("AR prog.a", "prog.a", ["sp-ar", "rcs", "prog.a", "prog.o"], ["prog.o"], env, :cache)
-        subject.run(
-          target: "prog.a",
-          sources: ["prog.o"],
-          cache: :cache,
-          env: env,
-          vars: {"AR" => "sp-ar"})
-      end
-
-      it "supports overriding ARCMD construction variable" do
-        expect(subject).to receive(:standard_build).with("AR prog.a", "prog.a", ["special", "AR!", "prog.o"], ["prog.o"], env, :cache)
-        subject.run(
-          target: "prog.a",
-          sources: ["prog.o"],
-          cache: :cache,
-          env: env,
-          vars: {"ARCMD" => ["special", "AR!", "${_SOURCES}"]})
-      end
-    end
-  end
-end