diff --git a/tools/maven/suppressions.xml b/tools/maven/suppressions.xml
index 1d62beb4d6b92b80da081efd5bc3312507892942..0f5a9ef04158e743dcea709575e0c6847a228383 100644
--- a/tools/maven/suppressions.xml
+++ b/tools/maven/suppressions.xml
@@ -32,6 +32,11 @@ under the License.
 		<suppress files="NoticeFileChecker.java" checks="Regexp"/>
 		<suppress files="NoticeFileChecker.java" checks="IllegalImport"/>
 
+		<suppress files="JoinOperator.java" checks="FileLength"/>
+		<suppress files="WindowOperatorTest.java" checks="FileLength"/>
+		<suppress files="WindowOperatorContractTest.java" checks="FileLength"/>
+		<suppress files="NFAITCase.java" checks="FileLength"/>
+
 		<suppress files="org[\\/]apache[\\/]flink[\\/]formats[\\/]avro[\\/]generated[\\/].*.java" checks="[a-zA-Z0-9]*"/>
 		<suppress files="org[\\/]apache[\\/]flink[\\/]formats[\\/]parquet[\\/]generated[\\/].*.java" checks="[a-zA-Z0-9]*"/>
 		<!-- Sometimes we have to temporarily fix very long, different formatted Calcite files. -->