diff --git a/eo-maven-plugin/src/main/java/org/eolang/maven/LintMojo.java b/eo-maven-plugin/src/main/java/org/eolang/maven/LintMojo.java
index 9373b6dcaf..50854405b7 100644
--- a/eo-maven-plugin/src/main/java/org/eolang/maven/LintMojo.java
+++ b/eo-maven-plugin/src/main/java/org/eolang/maven/LintMojo.java
@@ -80,7 +80,7 @@ public final class LintMojo extends SafeMojo {
     @Parameter(
         property = "eo.failOnWarning",
         required = true,
-        defaultValue = "false"
+        defaultValue = "true"
     )
     private boolean failOnWarning;
 
diff --git a/eo-maven-plugin/src/test/java/org/eolang/maven/LintMojoTest.java b/eo-maven-plugin/src/test/java/org/eolang/maven/LintMojoTest.java
index 2d7d86d677..51f153ab25 100644
--- a/eo-maven-plugin/src/test/java/org/eolang/maven/LintMojoTest.java
+++ b/eo-maven-plugin/src/test/java/org/eolang/maven/LintMojoTest.java
@@ -64,7 +64,9 @@ void lintsAgainAfterModification(@Mktmp final Path temp, @RandomProgram final St
                     .plugins()
                     .appendItself()
                     .execution()
-                    .goals("register", "parse", "optimize", "shake", "lint");
+                    .goals("register", "parse", "optimize", "shake", "lint")
+                    .configuration()
+                    .set("failOnWarning", "false");
                 f.exec("process-classes");
                 final long before = f.files().file(
                     "target/eo/6-lint/foo.xmir"