diff --git a/openjpa-project/BUILDING.txt b/openjpa-project/BUILDING.txt
index d59310bd8..9e8bc15de 100644
--- a/openjpa-project/BUILDING.txt
+++ b/openjpa-project/BUILDING.txt
@@ -195,7 +195,7 @@ Running unit tests in the Debugger
 By default all tests run against a derby database.
 To run the tests in the debugger simply add the following JVM properties
 
- -Dopenjpa.ConnectionURL=jdbc:derby:target/database/openjpa-derby-database;create=true -Dopenjpa.ConnectionDriverName=org.apache.derby.jdbc.EmbeddedDriver
+ -ea -Dopenjpa.ConnectionURL=jdbc:derby:target/database/openjpa-derby-database;create=true -Dopenjpa.ConnectionDriverName=org.apache.derby.jdbc.EmbeddedDriver
 
 For running against a MySQL Docker installation:
  -ea -Dopenjpa.ConnectionDriverName=com.mysql.jdbc.Driver -Dopenjpa.ConnectionURL=jdbc:mysql://localhost:3306/openjpatst -Dopenjpa.ConnectionUserName=openjpatst -Dopenjpa.ConnectionPassword=openjpatst