diff --git a/src/tests/addQuestion.test.ts b/src/tests/addQuestion.test.ts
new file mode 100644
index 0000000..85c3316
--- /dev/null
+++ b/src/tests/addQuestion.test.ts
@@ -0,0 +1,48 @@
+import { addQuestion, createQuestion } from '../utils/classes'
+import { Subject, Question } from '../types/basicTypes'
+
+const question: Question = createQuestion('asd', 'asd', { type: 'simple' })
+
+test('Adds questions to empty db', () => {
+  const emptyDb: Subject[] = []
+  addQuestion(emptyDb, 'test subject', question)
+  expect(emptyDb.length).toBe(1)
+})
+
+test('Adds questions next to existing', () => {
+  const db: Subject[] = [
+    {
+      Name: 'test subject',
+      Questions: [question],
+    },
+  ]
+  addQuestion(db, 'another something', question)
+  expect(db.length).toBe(2)
+})
+
+test('Does not add new subject, multiple new questions', () => {
+  const db: Subject[] = [
+    {
+      Name: 'test subject',
+      Questions: [question],
+    },
+  ]
+  addQuestion(db, 'test subject', question)
+  addQuestion(db, 'test subject', question)
+  addQuestion(db, 'test subject', question)
+  addQuestion(db, 'test subject', question)
+  expect(db.length).toBe(1)
+})
+
+test('Adds new subjects, multiple new questions', () => {
+  const db: Subject[] = [
+    {
+      Name: 'test subject',
+      Questions: [question],
+    },
+  ]
+  addQuestion(db, 'gfjdkglfd', question)
+  addQuestion(db, ' somrthing test ', question)
+  addQuestion(db, 'aaaaaaaa', question)
+  expect(db.length).toBe(4)
+})
diff --git a/src/utils/classes.ts b/src/utils/classes.ts
index 5477a2e..d5eb488 100755
--- a/src/utils/classes.ts
+++ b/src/utils/classes.ts
@@ -460,10 +460,10 @@ function addQuestion(
   logger.DebugLog('Adding new question with subjName: ' + subj, 'qdb add', 1)
   logger.DebugLog(question, 'qdb add', 3)
 
-  const i = data.findIndex((x) => {
-    return !subj
+  const i = data.findIndex((subject) => {
+    return subj
       .toLowerCase()
-      .includes(getSubjNameWithoutYear(x.Name).toLowerCase())
+      .includes(getSubjNameWithoutYear(subject.Name).toLowerCase())
   })
 
   if (i !== -1) {