diff --git a/python/testData/inspections/PyUnresolvedReferencesInspection/baseClassAssignment.py b/python/testData/inspections/PyUnresolvedReferencesInspection/baseClassAssignment.py
new file mode 100644
index 000000000000..a59c36b18e5a
--- /dev/null
+++ b/python/testData/inspections/PyUnresolvedReferencesInspection/baseClassAssignment.py
@@ -0,0 +1,14 @@
+class A(object):
+    def foo(self):
+        pass
+
+
+C = A
+
+
+class B(C):
+    pass
+
+
+b = B()
+b.foo() #pass
diff --git a/python/testSrc/com/jetbrains/python/inspections/PyUnresolvedReferencesInspectionTest.java b/python/testSrc/com/jetbrains/python/inspections/PyUnresolvedReferencesInspectionTest.java
index 85fffa2e3ea9..9a55669d630c 100644
--- a/python/testSrc/com/jetbrains/python/inspections/PyUnresolvedReferencesInspectionTest.java
+++ b/python/testSrc/com/jetbrains/python/inspections/PyUnresolvedReferencesInspectionTest.java
@@ -232,6 +232,11 @@ public class PyUnresolvedReferencesInspectionTest extends PyTestCase {
     doTest();
   }
 
+  // PY-5427
+  public void testBaseClassAssignment() {
+    doTest();
+  }
+
   private void doTest() {
     myFixture.configureByFile(TEST_DIRECTORY + getTestName(true) + ".py");
     myFixture.enableInspections(PyUnresolvedReferencesInspection.class);