diff --git a/src/bin/termptyesc.c b/src/bin/termptyesc.c
index 2e501f2a..a0fcfe8a 100644
--- a/src/bin/termptyesc.c
+++ b/src/bin/termptyesc.c
@@ -3049,6 +3049,8 @@ _handle_resize_by_chars(Termpty *ty, Eina_Unicode **ptr)
         evas_object_resize(wn,
                            base_w + step_w * w,
                            base_h + step_h * h);
+#else
+        tytest_termio_resize(w, h);
 #endif
         termpty_resize(ty, w, h);
      }
diff --git a/src/bin/tytest.c b/src/bin/tytest.c
index bfecd047..88f14785 100644
--- a/src/bin/tytest.c
+++ b/src/bin/tytest.c
@@ -156,8 +156,19 @@ _tytest_checksum(Termpty *ty)
 Evas_Textgrid_Cell *
 test_textgrid_cellrow_get(Evas_Object *obj EINA_UNUSED, int y)
 {
-   assert (y >= 0 && y < TY_H);
-   return &_cells[y * TY_W];
+   assert (y >= 0 && y < _sd.pty->h);
+   return &_cells[y * _sd.pty->w];
+}
+
+void
+tytest_termio_resize(int w, int h)
+{
+   Evas_Textgrid_Cell *cells = realloc(_cells,
+                                       w * h * sizeof(Evas_Textgrid_Cell));
+   assert (cells);
+   _sd.grid.w = w;
+   _sd.grid.h = h;
+   _cells = cells;
 }
 
 
diff --git a/src/bin/tytest.h b/src/bin/tytest.h
index ad02d142..57ce4fc5 100644
--- a/src/bin/tytest.h
+++ b/src/bin/tytest.h
@@ -15,6 +15,8 @@ test_textgrid_palette_get(const Evas_Object *obj,
 #define evas_object_textgrid_cellrow_get test_textgrid_cellrow_get
 Evas_Textgrid_Cell *
 test_textgrid_cellrow_get(Evas_Object *obj, int y);
+void
+tytest_termio_resize(int w, int h);
 
 void tytest_init(void);
 void tytest_shutdown(void);