diff --git a/src/grid/ntv2/mod.rs b/src/grid/ntv2/mod.rs
index acffe80..83627f8 100644
--- a/src/grid/ntv2/mod.rs
+++ b/src/grid/ntv2/mod.rs
@@ -207,7 +207,7 @@ mod tests {
             .contains(&"5458".to_string()));
 
         // Grids with no children do not appear in the lookup table
-        assert!(ntv2_grid.lookup_table.get("5556").is_none());
+        assert!(!ntv2_grid.lookup_table.contains_key("5556"));
 
         Ok(())
     }
diff --git a/src/op/parsed_parameters.rs b/src/op/parsed_parameters.rs
index 6e850af..0e67ecf 100644
--- a/src/op/parsed_parameters.rs
+++ b/src/op/parsed_parameters.rs
@@ -535,12 +535,12 @@ mod tests {
 
         // Booleans correctly parsed?
         assert!(
-            p.boolean.get("flag").is_some(),
+            p.boolean.contains("flag"),
             "`flag` not in registered booleans: {:#?}",
             p.boolean
         );
         assert!(
-            p.boolean.get("galf").is_none(),
+            !p.boolean.contains("galf"),
             "`galf` not in registered booleans: {:?}",
             p.boolean
         );