diff --git a/src/language/safe-ds-module.ts b/src/language/safe-ds-module.ts
index fe542f0ba..b4ffc13a3 100644
--- a/src/language/safe-ds-module.ts
+++ b/src/language/safe-ds-module.ts
@@ -21,7 +21,7 @@ import { SafeDsClasses } from './builtins/safe-ds-classes.js';
 import { SafeDsPackageManager } from './workspace/safe-ds-package-manager.js';
 import { SafeDsNodeMapper } from './helpers/safe-ds-node-mapper.js';
 import { SafeDsAnnotations } from './builtins/safe-ds-annotations.js';
-import {SafeDsClassHierarchy} from "./typing/safe-ds-class-hierarchy.js";
+import { SafeDsClassHierarchy } from './typing/safe-ds-class-hierarchy.js';
 
 /**
  * Declaration of custom services - add your own service classes here.
diff --git a/src/language/typing/safe-ds-class-hierarchy.ts b/src/language/typing/safe-ds-class-hierarchy.ts
index 71c50151c..cf7608add 100644
--- a/src/language/typing/safe-ds-class-hierarchy.ts
+++ b/src/language/typing/safe-ds-class-hierarchy.ts
@@ -41,7 +41,7 @@ export class SafeDsClassHierarchy {
             }
         };
 
-        return stream((generator)());
+        return stream(generator());
     }
 
     /**
diff --git a/src/language/validation/inheritance.ts b/src/language/validation/inheritance.ts
index ffb8cf552..8419443e3 100644
--- a/src/language/validation/inheritance.ts
+++ b/src/language/validation/inheritance.ts
@@ -46,10 +46,10 @@ export const classMustNotInheritItself = (services: SafeDsServices) => {
     return (node: SdsClass, accept: ValidationAcceptor): void => {
         const superClasses = classHierarchy.streamSuperclasses(node);
         if (superClasses.includes(node)) {
-            accept('error', "A class must not directly or indirectly be a subtype of itself.", {
+            accept('error', 'A class must not directly or indirectly be a subtype of itself.', {
                 node: parentTypesOrEmpty(node)[0],
                 code: CODE_INHERITANCE_CYCLE,
             });
         }
-    }
-}
+    };
+};
diff --git a/src/language/validation/safe-ds-validator.ts b/src/language/validation/safe-ds-validator.ts
index 2b31bae8a..3737afa72 100644
--- a/src/language/validation/safe-ds-validator.ts
+++ b/src/language/validation/safe-ds-validator.ts
@@ -86,7 +86,7 @@ import {
     namedTypeMustNotSetTypeParameterMultipleTimes,
     namedTypeTypeArgumentListMustNotHavePositionalArgumentsAfterNamedArguments,
 } from './other/types/namedTypes.js';
-import {classMustNotInheritItself, classMustOnlyInheritASingleClass} from "./inheritance.js";
+import { classMustNotInheritItself, classMustOnlyInheritASingleClass } from './inheritance.js';
 
 /**
  * Register custom validation checks.