diff --git a/python/helpers/python-skeletons/_csv.py b/python/helpers/python-skeletons/_csv.py
index 8d5aa3ed6b76..47a51a3ce9e5 100644
--- a/python/helpers/python-skeletons/_csv.py
+++ b/python/helpers/python-skeletons/_csv.py
@@ -1,10 +1,13 @@
 """Skeleton for 'csv' stdlib module."""
 
-def register_dialect(name, dialect=None, **fmtparams=None):
+import _csv
+
+
+def register_dialect(name, dialect=None, **fmtparams):
     """Associate dialect with name.
 
     :type name: string
-    :type dialect: Dialect
+    :type dialect: _csv.Dialect
     :rtype: None
     """
     pass
\ No newline at end of file
diff --git a/python/testData/inspections/PyTypeCheckerInspection/CsvRegisterDialect/_csv.py b/python/testData/inspections/PyTypeCheckerInspection/CsvRegisterDialect/_csv.py
new file mode 100644
index 000000000000..e7d846d84c79
--- /dev/null
+++ b/python/testData/inspections/PyTypeCheckerInspection/CsvRegisterDialect/_csv.py
@@ -0,0 +1,5 @@
+def register_dialect(name, dialect):
+    pass
+
+class Dialect(object):
+    pass
\ No newline at end of file
diff --git a/python/testData/inspections/PyTypeCheckerInspection/CsvRegisterDialect/a.py b/python/testData/inspections/PyTypeCheckerInspection/CsvRegisterDialect/a.py
new file mode 100644
index 000000000000..2b0991c17424
--- /dev/null
+++ b/python/testData/inspections/PyTypeCheckerInspection/CsvRegisterDialect/a.py
@@ -0,0 +1,6 @@
+import csv
+
+class A(object):
+    pass
+
+csv.register_dialect(<warning descr="Expected type 'Union[str, unicode]', got 'A' instead">A()</warning>, <warning descr="Expected type 'Dialect', got 'A' instead">A()</warning>, delimiter=':', quoting=csv.QUOTE_NONE)
\ No newline at end of file
diff --git a/python/testData/inspections/PyTypeCheckerInspection/CsvRegisterDialect/csv.py b/python/testData/inspections/PyTypeCheckerInspection/CsvRegisterDialect/csv.py
new file mode 100644
index 000000000000..d7cb938733ed
--- /dev/null
+++ b/python/testData/inspections/PyTypeCheckerInspection/CsvRegisterDialect/csv.py
@@ -0,0 +1,3 @@
+from _csv import register_dialect
+
+__all__ = ["register_dialect"]
\ No newline at end of file
diff --git a/python/testSrc/com/jetbrains/python/inspections/PyTypeCheckerInspectionTest.java b/python/testSrc/com/jetbrains/python/inspections/PyTypeCheckerInspectionTest.java
index f851a110c516..be038d980254 100644
--- a/python/testSrc/com/jetbrains/python/inspections/PyTypeCheckerInspectionTest.java
+++ b/python/testSrc/com/jetbrains/python/inspections/PyTypeCheckerInspectionTest.java
@@ -326,4 +326,9 @@ public class PyTypeCheckerInspectionTest extends PyTestCase {
   public void testFunctionReturnType() {
     doTest();
   }
+
+  // PY-19522
+  public void testCsvRegisterDialect() {
+    doMultiFileTest();
+  }
 }