diff --git a/CHANGELOG.md b/CHANGELOG.md
index d070d7c42..3c5297e9c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,6 +13,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Validation for `EvcsInput` [#1000](https://github.com/ie3-institute/PowerSystemDataModel/issues/1000)
 - Scaling method in system participant copy builders [#1011](https://github.com/ie3-institute/PowerSystemDataModel/issues/1011)
 - Added separate field for maximum power limit for DC to evtype [#876](https://github.com/ie3-institute/PowerSystemDataModel/issues/876)
+- Added test for invalid input data in `CsvRawGridSource` [#1021](https://github.com/ie3-institute/PowerSystemDataModel/issues/1021)
 
 ### Fixed
 - Fixed Couchbase integration tests that randomly failed [#755](https://github.com/ie3-institute/PowerSystemDataModel/issues/755)
diff --git a/src/test/groovy/edu/ie3/datamodel/io/source/csv/CsvRawGridSourceTest.groovy b/src/test/groovy/edu/ie3/datamodel/io/source/csv/CsvRawGridSourceTest.groovy
index 876b73160..0ac06c263 100644
--- a/src/test/groovy/edu/ie3/datamodel/io/source/csv/CsvRawGridSourceTest.groovy
+++ b/src/test/groovy/edu/ie3/datamodel/io/source/csv/CsvRawGridSourceTest.groovy
@@ -14,6 +14,8 @@ import edu.ie3.datamodel.io.factory.input.Transformer3WInputEntityData
 import edu.ie3.datamodel.io.factory.input.TypedConnectorInputEntityData
 import edu.ie3.datamodel.io.source.RawGridSource
 import edu.ie3.datamodel.io.source.TypeSource
+import edu.ie3.datamodel.models.input.NodeInput
+import edu.ie3.datamodel.models.input.OperatorInput
 import edu.ie3.datamodel.models.input.connector.LineInput
 import edu.ie3.datamodel.models.input.connector.SwitchInput
 import edu.ie3.datamodel.models.input.connector.Transformer3WInput
@@ -589,4 +591,32 @@ class CsvRawGridSourceTest extends Specification implements CsvTestDataMeta {
     then: "the optional is empty"
     actual.allEntitiesAsList().empty
   }
+
+  def "A CsvRawGridSource should process invalid input data as expected when requested to provide an instance of RawGridElements"() {
+    given:
+    def typeSource = new TypeSource(new CsvDataSource(csvSep, typeFolderPath, fileNamingStrategy))
+    def rawGridSource =
+    new RawGridSource(typeSource, new CsvDataSource(csvSep, gridDefaultFolderPath, fileNamingStrategy)) {
+      @Override
+      Map<UUID, NodeInput> getNodes() {
+        return Collections.emptyMap()
+      }
+
+      @Override
+      Map<UUID, NodeInput> getNodes(Map<UUID, OperatorInput> operators) {
+        return Collections.emptyMap()
+      }
+    }
+
+    when:
+    def rawGridElements = Try.of(() -> rawGridSource.gridData, SourceException)
+
+    then:
+    rawGridElements.failure
+    rawGridElements.data == Optional.empty()
+
+    Exception ex = rawGridElements.exception.get()
+    ex.class == SourceException
+    ex.message.startsWith("edu.ie3.datamodel.exceptions.FailureException: 2 exception(s) occurred within \"LineInput\" data, one is: edu.ie3.datamodel.exceptions.FactoryException: edu.ie3.datamodel.exceptions.SourceException: Linked nodeA with UUID 4ca90220-74c2-4369-9afa-a18bf068840d was not found for entity")
+  }
 }
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