diff --git a/src/cli/Main_test.go b/src/cli/Main_test.go
index 93138a8..b27a964 100644
--- a/src/cli/Main_test.go
+++ b/src/cli/Main_test.go
@@ -24,6 +24,9 @@ func TestCLI(t *testing.T) {
 		{[]string{"build", "../../examples/hello", "--invalid"}, 2},
 		{[]string{"build", "../../examples/hello", "--dry"}, 0},
 		{[]string{"build", "../../examples/hello", "--dry", "--verbose"}, 0},
+		{[]string{"build", "../../examples/hello", "--dry", "--os", "linux"}, 0},
+		{[]string{"build", "../../examples/hello", "--dry", "--os", "mac"}, 0},
+		{[]string{"build", "../../examples/hello", "--dry", "--os", "windows"}, 0},
 		{[]string{"build", "../../examples/hello/hello.q", "--dry"}, 0},
 		{[]string{"build", "../../examples/hello"}, 0},
 		{[]string{"run", "../../examples/hello", "--invalid"}, 2},