diff --git a/test/lib/database.js b/test/lib/database.js
index 512de4ad..8956fed3 100644
--- a/test/lib/database.js
+++ b/test/lib/database.js
@@ -176,6 +176,10 @@ describe("lib/database", function() {
 					() => items.addItem('a', NaN),
 					new Error("count must be a number")
 				);
+				assert.throws(
+					() => items.addItem('a', "1"),
+					new Error("count must be a number")
+				);
 			});
 		});
 
@@ -206,6 +210,10 @@ describe("lib/database", function() {
 					() => items.removeItem('a', 'b'),
 					new Error("count must be a number")
 				);
+				assert.throws(
+					() => items.removeItem('a', "1"),
+					new Error("count must be a number")
+				);
 			});
 		});
 	});