diff --git a/java/ql/src/Performance/InnerClassCouldBeStatic.ql b/java/ql/src/Performance/InnerClassCouldBeStatic.ql
index 1a83db097f3..02ca5544da2 100644
--- a/java/ql/src/Performance/InnerClassCouldBeStatic.ql
+++ b/java/ql/src/Performance/InnerClassCouldBeStatic.ql
@@ -130,7 +130,9 @@ predicate potentiallyStatic(InnerClass c) {
     )
   ) and
   // JUnit Nested test classes are required to be non-static.
-  not c.hasAnnotation("org.junit.jupiter.api", "Nested")
+  not c.hasAnnotation("org.junit.jupiter.api", "Nested") and
+  // There's no `static` in kotlin:
+  not c.getLocation().getFile().isKotlinSourceFile()
 }
 
 /**
diff --git a/java/ql/test/kotlin/query-tests/InnerClassCouldBeStatic/InnerClassCouldBeStatic.expected b/java/ql/test/kotlin/query-tests/InnerClassCouldBeStatic/InnerClassCouldBeStatic.expected
index 1fb8417d622..e69de29bb2d 100644
--- a/java/ql/test/kotlin/query-tests/InnerClassCouldBeStatic/InnerClassCouldBeStatic.expected
+++ b/java/ql/test/kotlin/query-tests/InnerClassCouldBeStatic/InnerClassCouldBeStatic.expected
@@ -1 +0,0 @@
-| Test.kt:3:5:5:5 | Companion | Companion should be made static, since the enclosing instance is not used. |