diff --git a/tests/bugs/gh_7488_test.py b/tests/bugs/gh_7488_test.py
new file mode 100644
index 00000000..d0f048aa
--- /dev/null
+++ b/tests/bugs/gh_7488_test.py
@@ -0,0 +1,66 @@
+#coding:utf-8
+
+"""
+ID:          issue-7488
+ISSUE:       7488
+TITLE:       Invalid real to string cast
+NOTES:
+    [14.02.2023] pzotov
+    Confirmed bug on 5.0.0.967; 4.0.3.2904
+    Checked on intermediate builds 5.0.0.970; 4.0.3.2906
+"""
+
+import pytest
+from firebird.qa import *
+
+db = db_factory()
+
+test_script = """
+    set list on;
+    select x, cast(x as varchar(10)) s
+    from
+    (
+        select 345.12e-2 x from rdb$database union all
+        select 4512e-4 from rdb$database union all
+        select 3451.2e-3 from rdb$database union all
+        select 34.512e-1 from rdb$database union all
+        select 3.4512e0 from rdb$database union all
+        select 0.34512e1 from rdb$database union all
+        select 0.034512e2 from rdb$database union all
+        select 0.0034512e3 from rdb$database
+    );
+"""
+
+act = isql_act('db', test_script)
+
+expected_stdout = """
+    X                               3.451200000000000
+    S                               3.45
+
+    X                               0.4512000000000000
+    S                               0.45
+
+    X                               3.451200000000000
+    S                               3.45
+
+    X                               3.451200000000000
+    S                               3.45
+
+    X                               3.451200000000000
+    S                               3.45
+
+    X                               3.451200000000000
+    S                               3.45
+
+    X                               3.451200000000000
+    S                               3.45
+
+    X                               3.451200000000000
+    S                               3.45
+"""
+
+@pytest.mark.version('>=4.0.3')
+def test_1(act: Action):
+    act.expected_stdout = expected_stdout
+    act.execute(combine_output = True)
+    assert act.clean_stdout == act.clean_expected_stdout