diff --git a/pygmt/tests/test_helpers.py b/pygmt/tests/test_helpers.py
index 5d13428b0b7..09d65eb345c 100644
--- a/pygmt/tests/test_helpers.py
+++ b/pygmt/tests/test_helpers.py
@@ -20,6 +20,7 @@
     unique_name,
 )
 from pygmt.helpers.testing import load_static_earth_relief, skip_if_no
+from pygmt.params import Axis, Frame
 
 
 def test_load_static_earth_relief():
@@ -52,11 +53,12 @@ def test_non_ascii_to_octal():
     fig.basemap(
         region=[0, 10, 0, 5],
         projection="X10c/5c",
-        frame=[
-            "xaf+lISOLatin1: fi‰“”¥",
-            "yaf+lSymbol: αβ∇∋∈",
-            "WSen+tZapfDingbats: ①❷➂➍✦❝❞",
-        ],
+        frame=Frame(
+            axes="WSen",
+            xaxis=Axis(annot=True, tick=True, label="ISOLatin1: fi‰“”¥"),
+            yaxis=Axis(annot=True, tick=True, label="Symbol: αβ∇∋∈"),
+            title="ZapfDingbats: ①❷➂➍✦❝❞",
+        ),
     )
     return fig