diff --git a/storio-sqlite/src/test/java/com/pushtorefresh/storio/sqlite/impl/ChainImplTest.java b/storio-sqlite/src/test/java/com/pushtorefresh/storio/sqlite/impl/ChainImplTest.java
index 2b012c66a..1d3a2e31f 100644
--- a/storio-sqlite/src/test/java/com/pushtorefresh/storio/sqlite/impl/ChainImplTest.java
+++ b/storio-sqlite/src/test/java/com/pushtorefresh/storio/sqlite/impl/ChainImplTest.java
@@ -6,6 +6,7 @@
 
 import org.junit.Test;
 
+import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
 
@@ -26,4 +27,19 @@ public void proceed_shouldThrowIfIteratorEmpty() {
             assertThat(e).hasMessage("proceed was called on empty iterator");
         }
     }
+
+    @Test
+    public void proceed_shouldThrowIfCalledMultipleTimes() {
+        final List<Interceptor> interceptors = Arrays.asList(mock(Interceptor.class), mock(Interceptor.class));
+        try {
+            final Chain chain = new ChainImpl(interceptors.listIterator());
+            final PreparedOperation operation = mock(PreparedOperation.class);
+            chain.proceed(operation);
+            chain.proceed(operation);
+            failBecauseExceptionWasNotThrown(IllegalStateException.class);
+        } catch (IllegalStateException e) {
+            assertThat(e)
+                    .hasMessage("nextInterceptor " + interceptors.get(0) + " must call proceed() exactly once");
+        }
+    }
 }
\ No newline at end of file
diff --git a/storio-sqlite/src/test/java/com/pushtorefresh/storio/sqlite/operations/delete/PreparedDeleteObjectTest.java b/storio-sqlite/src/test/java/com/pushtorefresh/storio/sqlite/operations/delete/PreparedDeleteObjectTest.java
index aa8b9c086..5f01a1cfb 100644
--- a/storio-sqlite/src/test/java/com/pushtorefresh/storio/sqlite/operations/delete/PreparedDeleteObjectTest.java
+++ b/storio-sqlite/src/test/java/com/pushtorefresh/storio/sqlite/operations/delete/PreparedDeleteObjectTest.java
@@ -307,58 +307,61 @@ public void shouldThrowExceptionIfNoTypeMappingWasFoundWithoutAffectingDbAsCompl
         }
     }
 
-    @Test
-    public void shouldReturnObjectInGetData() {
-        final DeleteStub deleteStub = DeleteStub.newStubForOneObjectWithoutTypeMapping();
+    public static class OtherTests {
 
-        final PreparedDeleteObject<TestItem> operation = deleteStub.storIOSQLite
-                .delete()
-                .object(deleteStub.itemsRequestedForDelete.get(0))
-                .withDeleteResolver(deleteStub.deleteResolver)
-                .prepare();
+        @Test
+        public void shouldReturnObjectInGetData() {
+            final DeleteStub deleteStub = DeleteStub.newStubForOneObjectWithoutTypeMapping();
 
-        assertThat(operation.getData()).isEqualTo(deleteStub.itemsRequestedForDelete.get(0));
-    }
+            final PreparedDeleteObject<TestItem> operation = deleteStub.storIOSQLite
+                    .delete()
+                    .object(deleteStub.itemsRequestedForDelete.get(0))
+                    .withDeleteResolver(deleteStub.deleteResolver)
+                    .prepare();
+
+            assertThat(operation.getData()).isEqualTo(deleteStub.itemsRequestedForDelete.get(0));
+        }
 
-    @Test
-    public void deleteObjectObservableExecutesOnSpecifiedScheduler() {
-        final DeleteStub deleteStub = DeleteStub.newStubForOneObjectWithoutTypeMapping();
-        final SchedulerChecker schedulerChecker = SchedulerChecker.create(deleteStub.storIOSQLite);
+        @Test
+        public void deleteObjectObservableExecutesOnSpecifiedScheduler() {
+            final DeleteStub deleteStub = DeleteStub.newStubForOneObjectWithoutTypeMapping();
+            final SchedulerChecker schedulerChecker = SchedulerChecker.create(deleteStub.storIOSQLite);
 
-        final PreparedDeleteObject<TestItem> operation = deleteStub.storIOSQLite
-                .delete()
-                .object(deleteStub.itemsRequestedForDelete.get(0))
-                .withDeleteResolver(deleteStub.deleteResolver)
-                .prepare();
+            final PreparedDeleteObject<TestItem> operation = deleteStub.storIOSQLite
+                    .delete()
+                    .object(deleteStub.itemsRequestedForDelete.get(0))
+                    .withDeleteResolver(deleteStub.deleteResolver)
+                    .prepare();
 
-        schedulerChecker.checkAsObservable(operation);
-    }
+            schedulerChecker.checkAsObservable(operation);
+        }
 
-    @Test
-    public void deleteObjectSingleExecutesOnSpecifiedScheduler() {
-        final DeleteStub deleteStub = DeleteStub.newStubForOneObjectWithoutTypeMapping();
-        final SchedulerChecker schedulerChecker = SchedulerChecker.create(deleteStub.storIOSQLite);
+        @Test
+        public void deleteObjectSingleExecutesOnSpecifiedScheduler() {
+            final DeleteStub deleteStub = DeleteStub.newStubForOneObjectWithoutTypeMapping();
+            final SchedulerChecker schedulerChecker = SchedulerChecker.create(deleteStub.storIOSQLite);
 
-        final PreparedDeleteObject<TestItem> operation = deleteStub.storIOSQLite
-                .delete()
-                .object(deleteStub.itemsRequestedForDelete.get(0))
-                .withDeleteResolver(deleteStub.deleteResolver)
-                .prepare();
+            final PreparedDeleteObject<TestItem> operation = deleteStub.storIOSQLite
+                    .delete()
+                    .object(deleteStub.itemsRequestedForDelete.get(0))
+                    .withDeleteResolver(deleteStub.deleteResolver)
+                    .prepare();
 
-        schedulerChecker.checkAsSingle(operation);
-    }
+            schedulerChecker.checkAsSingle(operation);
+        }
 
-    @Test
-    public void deleteObjectCompletableExecutesOnSpecifiedScheduler() {
-        final DeleteStub deleteStub = DeleteStub.newStubForOneObjectWithoutTypeMapping();
-        final SchedulerChecker schedulerChecker = SchedulerChecker.create(deleteStub.storIOSQLite);
+        @Test
+        public void deleteObjectCompletableExecutesOnSpecifiedScheduler() {
+            final DeleteStub deleteStub = DeleteStub.newStubForOneObjectWithoutTypeMapping();
+            final SchedulerChecker schedulerChecker = SchedulerChecker.create(deleteStub.storIOSQLite);
 
-        final PreparedDeleteObject<TestItem> operation = deleteStub.storIOSQLite
-                .delete()
-                .object(deleteStub.itemsRequestedForDelete.get(0))
-                .withDeleteResolver(deleteStub.deleteResolver)
-                .prepare();
+            final PreparedDeleteObject<TestItem> operation = deleteStub.storIOSQLite
+                    .delete()
+                    .object(deleteStub.itemsRequestedForDelete.get(0))
+                    .withDeleteResolver(deleteStub.deleteResolver)
+                    .prepare();
 
-        schedulerChecker.checkAsCompletable(operation);
+            schedulerChecker.checkAsCompletable(operation);
+        }
     }
 }