diff --git a/src/main/java/org/jabref/gui/importer/ImportInspectionDialog.java b/src/main/java/org/jabref/gui/importer/ImportInspectionDialog.java
index 2ce86d731c4..b2e45d10c4e 100644
--- a/src/main/java/org/jabref/gui/importer/ImportInspectionDialog.java
+++ b/src/main/java/org/jabref/gui/importer/ImportInspectionDialog.java
@@ -1051,6 +1051,7 @@ public void mousePressed(MouseEvent e) {
                 if (other.isPresent()) {
                     // This will be true if the duplicate is in the existing
                     // database.
+                    //TODO: this could be where duplicate resolving bug starts
                     DuplicateResolverDialog diag = new DuplicateResolverDialog(getFrame(), other.get(),
                                                                                first, DuplicateResolverDialog.DuplicateResolverType.INSPECTION);
 
diff --git a/src/test/java/org/jabref/gui/DuplicateResolverDialogTest.java b/src/test/java/org/jabref/gui/DuplicateResolverDialogTest.java
new file mode 100644
index 00000000000..71269acdfb0
--- /dev/null
+++ b/src/test/java/org/jabref/gui/DuplicateResolverDialogTest.java
@@ -0,0 +1,78 @@
+package org.jabref.gui;
+
+import javafx.stage.Stage;
+import javafx.stage.StageStyle;
+import org.jabref.gui.mergeentries.MergeEntries;
+import org.jabref.model.database.BibDatabaseMode;
+import org.jabref.model.entry.BibEntry;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+//trying to find how this is linked to BibTexKey Duplicate Check throws NPE Bug#4614
+class DuplicateResolverDialogTest {
+
+    @Test
+    void givenNewDuplicateResolverDialogAndEmptyParameters_whenInitializing_thenNoError() {
+        Stage stage = new Stage();
+        JabRefFrame frame = new JabRefFrame(stage);
+        BibEntry one = new BibEntry();
+        BibEntry two = new BibEntry();
+        DuplicateResolverDialog.DuplicateResolverType type = DuplicateResolverDialog.DuplicateResolverType.IMPORT_CHECK;
+
+        DuplicateResolverDialog sut = new DuplicateResolverDialog(frame, one, two, type);
+    }
+
+    @Test
+    void givenUninitializedStage_whenInitializing_thenNoError() {
+        Stage sut;
+
+    }
+
+    @Test
+    void givenInitializedStage_whenInitializing_thenNoError() {
+        Stage sut = new Stage(StageStyle.DECORATED);
+
+    }
+
+    @Test
+    void givenNewJabRefFrame_whenInitializing_thenNoError() {
+        Stage stage = new Stage();
+        JabRefFrame sut = new JabRefFrame(stage);
+
+    }
+
+    @Test
+    void givenNewBibEntry_whenInitializing_thenNoError() {
+        BibEntry sut = new BibEntry();
+
+    }
+
+    @Test
+    void givenNewDuplicateResolverTypeIMPORT_CHECK_whenInitializing_thenEqualsIMPORT_CHECK() {
+        DuplicateResolverDialog.DuplicateResolverType sut = DuplicateResolverDialog.DuplicateResolverType.IMPORT_CHECK;
+        assertEquals(DuplicateResolverDialog.DuplicateResolverType.IMPORT_CHECK,sut);
+    }
+
+    @Test
+    void givenNewDuplicateResolverResultKEEP_LEFT_whenInitializing_thenEqualsIMPORT_CHECK() {
+        DuplicateResolverDialog.DuplicateResolverResult sut = DuplicateResolverDialog.DuplicateResolverResult.KEEP_LEFT;
+        assertEquals(DuplicateResolverDialog.DuplicateResolverResult.KEEP_LEFT,sut);
+    }
+
+    @Test
+    public void givenDuplicateResolverDialog_whenGetMergedEntry_thenMergedBibEntryMeReturned(){
+        Stage stage = new Stage();
+        JabRefFrame frame = new JabRefFrame(stage);
+        BibEntry one = new BibEntry();
+        BibEntry two = new BibEntry();
+        DuplicateResolverDialog.DuplicateResolverType type = DuplicateResolverDialog.DuplicateResolverType.IMPORT_CHECK;
+
+        DuplicateResolverDialog testDialog = new DuplicateResolverDialog(frame, one, two, type);
+
+        BibEntry sut = testDialog.getMergedEntry();
+        BibDatabaseMode mode = BibDatabaseMode.BIBTEX;
+
+        MergeEntries ans = new MergeEntries(one, two, mode);
+        assertEquals(ans, sut);
+    }
+}