diff --git a/jOOQ-test/src/test/java/org/jooq/test/all/testcases/AggregateWindowFunctionTests.java b/jOOQ-test/src/test/java/org/jooq/test/all/testcases/AggregateWindowFunctionTests.java
index 36ca15e081..4ed8ece20a 100644
--- a/jOOQ-test/src/test/java/org/jooq/test/all/testcases/AggregateWindowFunctionTests.java
+++ b/jOOQ-test/src/test/java/org/jooq/test/all/testcases/AggregateWindowFunctionTests.java
@@ -110,7 +110,6 @@ import java.sql.Date;
 import java.util.Arrays;
 import java.util.List;
 
-import org.jooq.DSLContext;
 import org.jooq.Field;
 import org.jooq.Name;
 import org.jooq.Record;
@@ -121,13 +120,11 @@ import org.jooq.Record5;
 import org.jooq.Record6;
 import org.jooq.Record9;
 import org.jooq.Result;
-import org.jooq.SQLDialect;
 import org.jooq.TableField;
 import org.jooq.TableRecord;
 import org.jooq.UpdatableRecord;
 import org.jooq.WindowDefinition;
 import org.jooq.WindowSpecification;
-import org.jooq.impl.DSL;
 import org.jooq.test.BaseTest;
 import org.jooq.test.jOOQAbstractTest;
 
@@ -965,7 +962,7 @@ extends BaseTest<A, AP, B, S, B2S, BS, L, X, DATE, BOOL, D, T, U, UU, I, IPK, T7
     }
 
     public void testListAgg() throws Exception {
-        assumeFamilyNotIn(DERBY);
+        assumeFamilyNotIn(DERBY, FIREBIRD);
 
         // [#3045] Skip this test for the time being
         if (!asList().contains(dialect().family())) {