diff --git a/environment.yml b/environment.yml
index a58e9cbd48a..bc18bcaaae6 100644
--- a/environment.yml
+++ b/environment.yml
@@ -27,7 +27,7 @@ dependencies:
     # Dev dependencies (style checks)
     - codespell
     - pre-commit
-    - ruff>=0.9.6
+    - ruff>=0.10.0
     # Dev dependencies (unit testing)
     - matplotlib-base
     - pytest>=6.0
diff --git a/pygmt/tests/test_datasets_load_remote_datasets.py b/pygmt/tests/test_datasets_load_remote_datasets.py
index 1f0c49bc4ed..db755890a26 100644
--- a/pygmt/tests/test_datasets_load_remote_datasets.py
+++ b/pygmt/tests/test_datasets_load_remote_datasets.py
@@ -41,7 +41,7 @@ def test_load_remote_dataset_invalid_resolutions():
     """
     Make sure _load_remote_dataset fails for invalid resolutions.
     """
-    resolutions = "1m 1d bla 60d 001m 03".split()
+    resolutions = ["1m", "1d", "bla", "60d", "001m", "03"]
     resolutions.append(60)
     for resolution in resolutions:
         with pytest.raises(GMTInvalidInput):
diff --git a/pygmt/tests/test_figure.py b/pygmt/tests/test_figure.py
index fd67d8baf57..7565e66f363 100644
--- a/pygmt/tests/test_figure.py
+++ b/pygmt/tests/test_figure.py
@@ -83,7 +83,20 @@ def test_figure_savefig_exists():
     fig = Figure()
     fig.basemap(region="10/70/-300/800", projection="X3i/5i", frame="af")
     prefix = "test_figure_savefig_exists"
-    for fmt in "bmp eps jpg jpeg pdf png ppm tif PNG JPG JPEG Png".split():
+    for fmt in [
+        "bmp",
+        "eps",
+        "jpg",
+        "jpeg",
+        "pdf",
+        "png",
+        "ppm",
+        "tif",
+        "PNG",
+        "JPG",
+        "JPEG",
+        "Png",
+    ]:
         fname = Path(f"{prefix}.{fmt}")
         fig.savefig(fname)
         assert fname.exists()
@@ -192,7 +205,7 @@ def test_figure_savefig_transparent():
     fig = Figure()
     fig.basemap(region="10/70/-300/800", projection="X3i/5i", frame="af")
     prefix = "test_figure_savefig_transparent"
-    for fmt in "pdf jpg bmp eps tif".split():
+    for fmt in ["pdf", "jpg", "bmp", "eps", "tif"]:
         fname = f"{prefix}.{fmt}"
         with pytest.raises(GMTInvalidInput):
             fig.savefig(fname, transparent=True)