diff --git a/torch-compiler/src/test/java/org/brightify/torch/SimpleEntityTest.java b/torch-compiler/src/test/java/org/brightify/torch/SimpleEntityTest.java
index 2f9f2c4..8da488d 100644
--- a/torch-compiler/src/test/java/org/brightify/torch/SimpleEntityTest.java
+++ b/torch-compiler/src/test/java/org/brightify/torch/SimpleEntityTest.java
@@ -65,5 +65,43 @@ public void testEntityWithTwoIdProperties() {
                 .withErrorContaining("There has to be exactly one @Id property in each entity!")
                 .in(JavaFileObjects.forResource("negative/EntityWithTwoIdProperties.java")).onLine(13);
     }
+    
+    @Test
+    public void testEntityWithIntId(){
+        ASSERT.about(javaSource()).that(JavaFileObjects.forResource("negative/EntityWithIntId.java")).
+                processedWith(new TorchCompilerEntrypoint()).failsToCompile().
+                withErrorContaining("@Id property has to be type Long.").
+                in(JavaFileObjects.forResource("negative/EntityWithIntId.java")).onLine(9);
+    }
+    
+    @Test
+    public void testEntityWithPrimitiveIntId(){
+        ASSERT.about(javaSource()).that(JavaFileObjects.forResource("negative/EntityWithPrimitiveIntId.java")).
+                processedWith(new TorchCompilerEntrypoint()).failsToCompile().
+                withErrorContaining("@Id property has to be type Long.").
+                in(JavaFileObjects.forResource("negative/EntityWithPrimitiveIntId.java")).onLine(9);
+    }
+
+    @Test
+    public void testEntityWithLongFieldsWithoutIdAnnotation(){
+        ASSERT.about(javaSource()).that(JavaFileObjects.forResource("negative/EntityWithLongFieldsWithoutIdAnnotation.java")).
+                processedWith(new TorchCompilerEntrypoint()).failsToCompile().
+                withErrorContaining("There has to be exactly one @Id property in each entity!").
+                in(JavaFileObjects.forResource("negative/EntityWithLongFieldsWithoutIdAnnotation.java")).onLine(6);
+        
+    }
+
+    @Test
+    public void testClassWithoutEntityAnnotation(){
+        ASSERT.about(javaSource()).that(JavaFileObjects.forResource("negative/ClassWithoutEntityAnnotation.java")).
+                processedWith(new TorchCompilerEntrypoint()).compilesWithoutError();
 
+    }
+    
+    @Test
+    public void testClassWithNoAnnotations(){
+        ASSERT.about(javaSource()).that(JavaFileObjects.forResource("negative/ClassWithNoAnnotations.java")).
+                processedWith(new TorchCompilerEntrypoint()).compilesWithoutError();
+        
+    }
 }
diff --git a/torch-compiler/src/test/resources/negative/ClassWithNoAnnotations.java b/torch-compiler/src/test/resources/negative/ClassWithNoAnnotations.java
new file mode 100644
index 0000000..f7c6214
--- /dev/null
+++ b/torch-compiler/src/test/resources/negative/ClassWithNoAnnotations.java
@@ -0,0 +1,7 @@
+package negative;
+
+public class ClassWithNoAnnotations{
+    Long id;
+    String name;
+    Long accountNumber;
+}
\ No newline at end of file
diff --git a/torch-compiler/src/test/resources/negative/ClassWithoutEntityAnnotation.java b/torch-compiler/src/test/resources/negative/ClassWithoutEntityAnnotation.java
new file mode 100644
index 0000000..9ed37f8
--- /dev/null
+++ b/torch-compiler/src/test/resources/negative/ClassWithoutEntityAnnotation.java
@@ -0,0 +1,9 @@
+package negative;
+
+import org.brightify.torch.annotation.Id;
+
+public class ClassWithoutEntityAnnotation{
+    @Id
+    Long id;
+    
+}
\ No newline at end of file
diff --git a/torch-compiler/src/test/resources/negative/EntityWithIntId.java b/torch-compiler/src/test/resources/negative/EntityWithIntId.java
new file mode 100644
index 0000000..afbe2d6
--- /dev/null
+++ b/torch-compiler/src/test/resources/negative/EntityWithIntId.java
@@ -0,0 +1,10 @@
+package negative;
+
+import org.brightify.torch.annotation.Entity;
+import org.brightify.torch.annotation.Id;
+
+@Entity
+public class EntityWithIntId {
+    @Id
+    Integer id;
+}
\ No newline at end of file
diff --git a/torch-compiler/src/test/resources/negative/EntityWithLongFieldsWithoutIdAnnotation.java b/torch-compiler/src/test/resources/negative/EntityWithLongFieldsWithoutIdAnnotation.java
new file mode 100644
index 0000000..ce4a363
--- /dev/null
+++ b/torch-compiler/src/test/resources/negative/EntityWithLongFieldsWithoutIdAnnotation.java
@@ -0,0 +1,10 @@
+package negative;
+
+import org.brightify.torch.annotation.Entity;
+
+@Entity
+public class EntityWithLongFieldsWithoutIdAnnotation{
+    Long id1;
+    Long id2;
+    Long id3;
+}
\ No newline at end of file
diff --git a/torch-compiler/src/test/resources/negative/EntityWithPrimitiveIntId.java b/torch-compiler/src/test/resources/negative/EntityWithPrimitiveIntId.java
new file mode 100644
index 0000000..dcc9eb4
--- /dev/null
+++ b/torch-compiler/src/test/resources/negative/EntityWithPrimitiveIntId.java
@@ -0,0 +1,10 @@
+package negative;
+
+import org.brightify.torch.annotation.Id;
+import org.brightify.torch.annotation.Entity;
+
+@Entity
+public class EntityWithPrimitiveIntId {
+    @Id
+    int id;
+}
\ No newline at end of file