diff --git a/spec/lib/cypress_rails/finds_bin_spec.rb b/spec/lib/cypress_rails/finds_bin_spec.rb
new file mode 100644
index 000000000..36ca41de6
--- /dev/null
+++ b/spec/lib/cypress_rails/finds_bin_spec.rb
@@ -0,0 +1,18 @@
+require "rails_helper"
+require "cypress-rails/finds_bin"
+
+RSpec.describe CypressRails::FindsBin do
+  describe ".call" do
+    it "finds the bin file" do
+      allow(ENV).to receive(:[]).with("KNAPSACK_PRO_CI_NODE_TOTAL").and_return(nil)
+      allow(ENV).to receive(:[]).with("KNAPSACK_PRO_CI_NODE_INDEX").and_return(nil)
+      expect(described_class.new.call).to eq("node_modules/.bin/cypress")
+    end
+
+    it "finds the bin file when the bin is not in the default location" do
+      allow(ENV).to receive(:[]).with("KNAPSACK_PRO_CI_NODE_TOTAL").and_return("1")
+      allow(ENV).to receive(:[]).with("KNAPSACK_PRO_CI_NODE_INDEX").and_return("1")
+      expect(described_class.new.call).to eq("node_modules/.bin/knapsack-pro-cypress")
+    end
+  end
+end