diff --git a/test/err/duplicate-global-static.c b/test/err/duplicate-global-static.c
new file mode 100644
index 000000000..6aa27f5b7
--- /dev/null
+++ b/test/err/duplicate-global-static.c
@@ -0,0 +1,18 @@
+/*
+  !!DESCRIPTION!! global duplicated with static variable
+  !!ORIGIN!!      cc65 regression tests
+  !!LICENCE!!     Public Domain
+  !!AUTHOR!!      Piotr Fusik
+*/
+
+/*
+  see: https://github.com/cc65/cc65/issues/191
+*/
+
+int n = 0;
+static int n = 0;           /* should give an error */
+
+int main(void)
+{
+    return n;
+}
diff --git a/test/err/duplicate-static-global.c b/test/err/duplicate-static-global.c
new file mode 100644
index 000000000..6e5e70a37
--- /dev/null
+++ b/test/err/duplicate-static-global.c
@@ -0,0 +1,18 @@
+/*
+  !!DESCRIPTION!! static duplicated with global variable
+  !!ORIGIN!!      cc65 regression tests
+  !!LICENCE!!     Public Domain
+  !!AUTHOR!!      Piotr Fusik
+*/
+
+/*
+  see: https://github.com/cc65/cc65/issues/191
+*/
+
+static int n = 0;
+int n = 0;           /* should give an error */
+
+int main(void)
+{
+    return n;
+}