diff --git a/plugins/package-managers/node/src/funTest/kotlin/NpmVersionUrlFunTest.kt b/plugins/package-managers/node/src/funTest/kotlin/NpmVersionUrlFunTest.kt
index a99c1a80bea64..63beb17d2f30a 100644
--- a/plugins/package-managers/node/src/funTest/kotlin/NpmVersionUrlFunTest.kt
+++ b/plugins/package-managers/node/src/funTest/kotlin/NpmVersionUrlFunTest.kt
@@ -27,6 +27,7 @@ import org.ossreviewtoolkit.analyzer.managers.resolveSingleProject
 import org.ossreviewtoolkit.analyzer.managers.withInvariantIssues
 import org.ossreviewtoolkit.model.ProjectAnalyzerResult
 import org.ossreviewtoolkit.model.fromYaml
+import org.ossreviewtoolkit.model.yamlMapper
 import org.ossreviewtoolkit.utils.test.getAssetFile
 import org.ossreviewtoolkit.utils.test.patchExpectedResult
 
@@ -41,7 +42,8 @@ class NpmVersionUrlFunTest : WordSpec({
             val actualResult = create("NPM", allowDynamicVersions = true)
                 .resolveSingleProject(definitionFile, resolveScopes = true)
 
-            actualResult.withInvariantIssues() shouldBe expectedResult.withInvariantIssues()
+            yamlMapper.writeValueAsString(actualResult.withInvariantIssues()) shouldBe
+                yamlMapper.writeValueAsString(expectedResult.withInvariantIssues())
         }
     }
 })