diff --git a/spec/cove/deployment_config/config_file_spec.rb b/spec/cove/deployment_config/config_file_spec.rb
new file mode 100644
index 0000000..9d72d90
--- /dev/null
+++ b/spec/cove/deployment_config/config_file_spec.rb
@@ -0,0 +1,19 @@
+RSpec.describe Cove::DeploymentConfig::ConfigFile do
+  describe "#directory" do
+    context "when the path is at the relative root" do
+      it "returns nil" do
+        file = described_class.new(path: "postgresql.conf", content: "")
+
+        expect(file.directory).to eq(nil)
+      end
+    end
+
+    context "when the path is in a subdirectory directory" do
+      it "returns the path to the directory" do
+        file = described_class.new(path: "config/postgres/postgresql.conf", content: "")
+
+        expect(file.directory).to eq("config/postgres")
+      end
+    end
+  end
+end