diff --git a/src/Rule/Rules/Composer/Psr4SourcePathsRule.php b/src/Rule/Rules/Composer/Psr4SourcePathsRule.php
index 88abecfb..8f8b2fe2 100644
--- a/src/Rule/Rules/Composer/Psr4SourcePathsRule.php
+++ b/src/Rule/Rules/Composer/Psr4SourcePathsRule.php
@@ -32,18 +32,6 @@ public function __construct(
     ) {
     }
 
-    /**
-     * @return list<string>
-     */
-    public function sourcePathsFor(string $basePath): array
-    {
-        if ($this->sourcePaths === null) {
-            return $this->psr4PathResolver->paths($basePath);
-        }
-
-        return $this->normalisePaths($this->sourcePaths, $basePath);
-    }
-
     public function evaluateProject(string $basePath, Architecture $architecture, array $skipPaths = []): ?RuleViolation
     {
         $composerFile = rtrim($basePath, '/') . '/composer.json';
diff --git a/tests/Rule/Composer/Psr4SourcePathsRuleTest.php b/tests/Rule/Composer/Psr4SourcePathsRuleTest.php
index 33528c5b..34be7cd7 100644
--- a/tests/Rule/Composer/Psr4SourcePathsRuleTest.php
+++ b/tests/Rule/Composer/Psr4SourcePathsRuleTest.php
@@ -157,14 +157,6 @@ public function testReadsSourcePathsFromComposerWhenSourcePathsAreNotConfigured(
             RuleViolation::class,
             $psr4SourcePathsRule->evaluateProject($basePath, Architecture::define())
         );
-        $this->assertSame(['app', 'tests', 'specs'], $psr4SourcePathsRule->sourcePathsFor($basePath));
-    }
-
-    public function testNormalisesExplicitSourcePaths(): void
-    {
-        $psr4SourcePathsRule = new Psr4SourcePathsRule([' src/ ', 'tests\\']);
-
-        $this->assertSame(['src', 'tests'], $psr4SourcePathsRule->sourcePathsFor($this->makeTempDir()));
     }
 
     public function testPassesWhenDotRelativeSourcePathsExistInComposerPsr4Autoloads(): void
@@ -190,7 +182,6 @@ public function testPassesWhenDotRelativeSourcePathsExistInComposerPsr4Autoloads
             RuleViolation::class,
             $psr4SourcePathsRule->evaluateProject($basePath, Architecture::define())
         );
-        $this->assertSame(['src', 'tests'], $psr4SourcePathsRule->sourcePathsFor($basePath));
     }
 
     public function testPassesWhenAbsoluteSourcePathsExistInComposerPsr4Autoloads(): void
@@ -216,7 +207,6 @@ public function testPassesWhenAbsoluteSourcePathsExistInComposerPsr4Autoloads():
             RuleViolation::class,
             $psr4SourcePathsRule->evaluateProject($basePath, Architecture::define())
         );
-        $this->assertSame(['src', 'tests'], $psr4SourcePathsRule->sourcePathsFor($basePath));
     }
 
     public function testPassesWhenComposerUsesAbsoluteSourcePath(): void