diff --git a/datafusion/optimizer/src/decorrelate_predicate_subquery.rs b/datafusion/optimizer/src/decorrelate_predicate_subquery.rs
index 8630c606499b3..5ecafe6e37147 100644
--- a/datafusion/optimizer/src/decorrelate_predicate_subquery.rs
+++ b/datafusion/optimizer/src/decorrelate_predicate_subquery.rs
@@ -602,12 +602,6 @@ mod tests {
         assert_optimized_plan_equal(&plan, expected)
     }
 
-    #[cfg(test)]
-    #[ctor::ctor]
-    fn init() {
-        let _ = env_logger::try_init();
-    }
-
     /// Test multiple correlated subqueries
     /// See subqueries.rs where_in_multiple()
     #[test]
diff --git a/datafusion/optimizer/src/lib.rs b/datafusion/optimizer/src/lib.rs
index b8217e0ac7a72..7930c059ea47f 100644
--- a/datafusion/optimizer/src/lib.rs
+++ b/datafusion/optimizer/src/lib.rs
@@ -49,3 +49,10 @@ pub use optimizer::{OptimizerConfig, OptimizerContext, OptimizerRule};
 pub use utils::optimize_children;
 
 mod plan_signature;
+
+#[cfg(test)]
+#[ctor::ctor]
+fn init() {
+    // Enable logging for tests
+    let _ = env_logger::try_init();
+}
diff --git a/datafusion/optimizer/src/scalar_subquery_to_join.rs b/datafusion/optimizer/src/scalar_subquery_to_join.rs
index 26f86c607a22b..04e0e0920b0c9 100644
--- a/datafusion/optimizer/src/scalar_subquery_to_join.rs
+++ b/datafusion/optimizer/src/scalar_subquery_to_join.rs
@@ -307,12 +307,6 @@ mod tests {
     };
     use std::ops::Add;
 
-    #[cfg(test)]
-    #[ctor::ctor]
-    fn init() {
-        let _ = env_logger::try_init();
-    }
-
     /// Test multiple correlated subqueries
     #[test]
     fn multiple_subqueries() -> Result<()> {