diff --git a/error-prone-contrib/src/test/java/tech/picnic/errorprone/refasterrules/RefasterRulesTest.java b/error-prone-contrib/src/test/java/tech/picnic/errorprone/refasterrules/RefasterRulesTest.java
index eeb1afdc5f..1129ca80f6 100644
--- a/error-prone-contrib/src/test/java/tech/picnic/errorprone/refasterrules/RefasterRulesTest.java
+++ b/error-prone-contrib/src/test/java/tech/picnic/errorprone/refasterrules/RefasterRulesTest.java
@@ -52,6 +52,7 @@ final class RefasterRulesTest {
           JUnitRules.class,
           LongStreamRules.class,
           MapEntryRules.class,
+          MapRules.class,
           MockitoRules.class,
           MultimapRules.class,
           NullRules.class,