diff --git a/internal/cnf/bash_test.go b/internal/cnf/bash_test.go
index 5ab3586..c7097a2 100644
--- a/internal/cnf/bash_test.go
+++ b/internal/cnf/bash_test.go
@@ -165,6 +165,7 @@ func TestBashSetCreateEncode(t *testing.T) {
 		encoded string
 	}{
 		{"ignore=xxx;\n", "key", `"newvalue"`, "ignore=xxx;\nkey=\"newvalue\";\n"},
+		{"#!/bin/bash\n\nfunc(){\n\techo \"something\";\n}\nignore=xxx;\n", "key", `"newvalue"`, "#!/bin/bash\nfunc(){\n\techo \"something\";\n}\nignore=xxx;\nkey=\"newvalue\";\n"},
 	}
 
 	for i, test := range tests {