diff --git a/src/test/java/org/jabref/logic/bibtexkeypattern/BibtexKeyGeneratorTest.java b/src/test/java/org/jabref/logic/bibtexkeypattern/BibtexKeyGeneratorTest.java
index 254a9c50bf0..a1fa67f4a8f 100644
--- a/src/test/java/org/jabref/logic/bibtexkeypattern/BibtexKeyGeneratorTest.java
+++ b/src/test/java/org/jabref/logic/bibtexkeypattern/BibtexKeyGeneratorTest.java
@@ -1026,6 +1026,48 @@ void generateKeyWithTwoModifiers() throws Exception {
         assertEquals("theinterestingtitle", BibtexKeyGenerator.generateKey(entry, "title:lower:(_)"));
     }
 
+    @Test
+    void generateKeyWithTruncate4Modifier() {
+        BibEntry entry = new BibEntry();
+        entry.setField(StandardField.TITLE, "The Interesting Title");
+        assertEquals("TheI", BibtexKeyGenerator.generateKey(entry, "title:truncate4"));
+    }
+
+    @Test
+    void generateKeyWithTruncate5Modifier() {
+        BibEntry entry = new BibEntry();
+        entry.setField(StandardField.TITLE, "The Interesting Title");
+        assertEquals("TheIn", BibtexKeyGenerator.generateKey(entry, "title:truncate5"));
+    }
+
+    @Test
+    void generateKeyWithTruncate6Modifier() {
+        BibEntry entry = new BibEntry();
+        entry.setField(StandardField.TITLE, "The Interesting Title");
+        assertEquals("TheInt", BibtexKeyGenerator.generateKey(entry, "title:truncate6"));
+    }
+
+    @Test
+    void generateKeyWithShortTruncateModifier() {
+        BibEntry entry = new BibEntry();
+        entry.setField(StandardField.TITLE, "The Interesting Title");
+        assertEquals("", BibtexKeyGenerator.generateKey(entry, "title:truncate0"));
+    }
+
+    @Test
+    void generateKeyWithLongTruncateModifier() {
+        BibEntry entry = new BibEntry();
+        entry.setField(StandardField.TITLE, "The Interesting Title");
+        assertEquals("TheInterestingTitle", BibtexKeyGenerator.generateKey(entry, "title:truncate99"));
+    }
+
+    @Test
+    void generateKeyWithTwoTruncateModifiers() {
+        BibEntry entry = new BibEntry();
+        entry.setField(StandardField.TITLE, "The Interesting Title");
+        assertEquals("The", BibtexKeyGenerator.generateKey(entry, "title:truncate5:truncate3"));
+    }
+
     @Test
     void generateKeyWithTitleCapitalizeModifier() throws Exception {
         BibEntry entry = new BibEntry();