diff --git a/build.gradle b/build.gradle
index d8e1a6c32..8ac4eda94 100644
--- a/build.gradle
+++ b/build.gradle
@@ -91,4 +91,5 @@ task checkstyle(type: Checkstyle) {
     classpath = files()
     source "${project.rootDir}"
     exclude("**/gen/**")
+    exclude("**/generated/**")
 }
diff --git a/config/checkstyle/checkstyle.xml b/config/checkstyle/checkstyle.xml
index 0a5b47eb8..bcddda794 100644
--- a/config/checkstyle/checkstyle.xml
+++ b/config/checkstyle/checkstyle.xml
@@ -11,6 +11,13 @@
 
     <module name="TreeWalker">
         <module name="OuterTypeFilename"/>
+        <module name="IllegalTokenText">
+            <property name="tokens" value="STRING_LITERAL, CHAR_LITERAL"/>
+            <property name="format"
+             value="\\u00(09|0(a|A)|0(c|C)|0(d|D)|22|27|5(C|c))|\\(0(10|11|12|14|15|42|47)|134)"/>
+            <property name="message"
+             value="Consider using special escape sequence instead of octal value or Unicode escaped value."/>
+        </module>
         <module name="AvoidEscapedUnicodeCharacters">
             <property name="allowEscapesForControlCharacters" value="true"/>
             <property name="allowByTailComment" value="true"/>