diff --git a/datafusion/sqllogictest/src/accounting_pool.rs b/datafusion/sqllogictest/src/accounting_pool.rs
index 4bb965aef0393..aec5390879761 100644
--- a/datafusion/sqllogictest/src/accounting_pool.rs
+++ b/datafusion/sqllogictest/src/accounting_pool.rs
@@ -40,7 +40,7 @@ use std::sync::Arc;
 /// untracked allocation — by definition, since DF's pool didn't see it.
 ///
 /// 600% high, but that's what it takes to pass the SLT suite right now. Goal should be ~10%
-const HEADROOM_FACTOR: f64 = 6.0;
+const HEADROOM_FACTOR: f64 = 5.0;
 
 pub struct AccountingMemoryPool {
     inner: Arc<dyn MemoryPool>,