diff --git a/Cargo.toml b/Cargo.toml
index 8351833..03eb08e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -27,7 +27,7 @@ harness = false
 [[test]]
 name = "line_numbers"
 path = "tests/line_numbers.rs"
-harness = true
+harness = false
 
 [[test]]
 name = "macros"
diff --git a/tests/line_numbers.rs b/tests/line_numbers.rs
index 9a376f8..41fb153 100644
--- a/tests/line_numbers.rs
+++ b/tests/line_numbers.rs
@@ -31,8 +31,8 @@ impl Log for Logger {
     fn flush(&self) {}
 }
 
-#[test]
-fn line_numbers() {
+#[cfg_attr(lib_build, test)]
+fn main() {
     #[cfg(not(any(
         feature = "max_level_off",
         feature = "max_level_error",