diff --git a/pirogue/single_inheritance.py b/pirogue/single_inheritance.py
index 5a5c315..7ac67f2 100644
--- a/pirogue/single_inheritance.py
+++ b/pirogue/single_inheritance.py
@@ -172,6 +172,9 @@ def __insert_trigger(self) -> str:
                 self.parent_table,
                 remove_pkey=False,
                 coalesce_pkey_default=True,
+                coalesce_pkey_default_value=default_value(
+                    self.cursor, self.child_schema, self.child_table, self.child_pkey
+                ),
                 remap_columns={self.parent_pkey: self.ref_parent_key},
                 inner_defaults=self.inner_defaults,
                 returning="{ppk} INTO NEW.{prk}".format(
diff --git a/pirogue/utils.py b/pirogue/utils.py
index 5c20226..8e93d80 100644
--- a/pirogue/utils.py
+++ b/pirogue/utils.py
@@ -154,6 +154,7 @@ def insert_command(
     remove_pkey: bool = True,
     pkey: str = None,
     coalesce_pkey_default: bool = False,
+    coalesce_pkey_default_value: str = None,
     skip_columns: list = [],
     comment_skipped: bool = True,
     remap_columns: dict = {},
@@ -186,6 +187,8 @@ def insert_command(
          can be manually specified.
     coalesce_pkey_default
          if True, the following expression is used to insert the primary key: COALESCE( NEW.{pkey}, {default_value} )
+    coalesce_pkey_default_value
+         optionally give the default value for the primary key
     skip_columns
         list of columns to be skipped
     comment_skipped
@@ -259,7 +262,9 @@ def value(col):
         )
         if coalesce_pkey_default and col == pkey:
             return "COALESCE( NEW.{cal}, {pk_def} )".format(
-                cal=cal, pk_def=default_value(pg_cur, table_schema, table_name, pkey)
+                cal=cal,
+                pk_def=coalesce_pkey_default_value
+                or default_value(pg_cur, table_schema, table_name, pkey),
             )
         elif col in inner_defaults:
             def_col = inner_defaults[col]
diff --git a/test/demo_data.sql b/test/demo_data.sql
index 561f7e9..577e279 100644
--- a/test/demo_data.sql
+++ b/test/demo_data.sql
@@ -6,18 +6,18 @@ CREATE SCHEMA pirogue_test;
 
 CREATE SEQUENCE pirogue_test.id_gen START 101;
 
-CREATE OR REPLACE FUNCTION pirogue_test.generate_id(table_name text)
+CREATE OR REPLACE FUNCTION pirogue_test.generate_id(number integer)
   RETURNS integer AS
 $BODY$
 DECLARE
 BEGIN
-    RETURN 1000 + nextval('pirogue_test.id_gen');
+    RETURN number + nextval('pirogue_test.id_gen');
 END;
 $BODY$
 LANGUAGE plpgsql;
 
 CREATE TABLE pirogue_test.animal (
-	aid integer PRIMARY KEY default pirogue_test.generate_id('animal'),
+	aid integer PRIMARY KEY default pirogue_test.generate_id(1000),
 	name text,
 	year smallint);
 
@@ -26,19 +26,19 @@ CREATE TABLE pirogue_test.dog_breed ( id integer PRIMARY KEY, breed_name text );
 CREATE TABLE pirogue_test.vet ( id integer PRIMARY KEY, vet_name text );
 
 CREATE TABLE pirogue_test.cat (
-	cid integer REFERENCES pirogue_test.animal,
+	cid integer default pirogue_test.generate_id(2000) REFERENCES pirogue_test.animal,
 	fk_breed integer REFERENCES pirogue_test.cat_breed,
 	fk_vet integer REFERENCES pirogue_test.vet,
 	eye_color text); -- not in top class, as some animals might not have eyes
 
 CREATE TABLE pirogue_test.dog (
-	did integer REFERENCES pirogue_test.animal,
+	did integer default pirogue_test.generate_id(3000) REFERENCES pirogue_test.animal,
 	fk_breed integer REFERENCES pirogue_test.dog_breed,
 	eye_color text);
 
 -- ref col has same name as parent pkey column
 CREATE TABLE pirogue_test.aardvark (
-   	aid integer REFERENCES pirogue_test.animal,
+   	aid integer default pirogue_test.generate_id(4000) REFERENCES pirogue_test.animal,
 	father text
 	-- ! if adding new fields here, complete the list on test_multiple_inheritance.test_merge_no_columns ! --
 	);
diff --git a/test/test_simple_inheritance.sh b/test/test_simple_inheritance.sh
index 1f293a1..34b6b79 100755
--- a/test/test_simple_inheritance.sh
+++ b/test/test_simple_inheritance.sh
@@ -29,10 +29,10 @@ RESULT=$(psql ${PSQL_ARGS} -c "SELECT COUNT(*) FROM pirogue_test.vw_animal_cat;"
 EXPECTED=0
 if [[ ${RESULT} =~ "${EXPECTED}" ]]; then echo "ok"; else echo "*** ERROR expected result: ${EXPECTED} got ${RESULT}" && ERROR=1; fi
 
-echo "test insert without pkey value (getting default from parent table)"
+echo "test insert without pkey value (getting default from child table)"
 psql --quiet -v ON_ERROR_STOP="on" -c "INSERT into pirogue_test.vw_animal_cat (fk_breed, eye_color, name, year) VALUES ('1', 'yellow', 'ninja', 1934);"
 RESULT=$(psql ${PSQL_ARGS} -c "SELECT cid FROM pirogue_test.vw_animal_cat")
-EXPECTED=1101
+EXPECTED=2101
 if [[ ${RESULT} =~ "${EXPECTED}" ]]; then echo "ok"; else echo "*** ERROR expected result: ${EXPECTED} got ${RESULT}" && ERROR=1; fi
 
 echo "test on table with same pkey/ref name"