diff --git a/doc/Makefile b/doc/Makefile
index 52f816f8ad0..81b3a53fcd2 100644
--- a/doc/Makefile
+++ b/doc/Makefile
@@ -1,7 +1,7 @@
 # Makefile for Sphinx documentation
 
 # You can set these variables from the command line.
-SPHINXOPTS    =
+SPHINXOPTS    = -j auto
 SPHINXBUILD   = sphinx-build
 SPHINXAUTOGEN = sphinx-autogen
 BUILDDIR      = _build
diff --git a/pygmt/tests/test_grdinfo.py b/pygmt/tests/test_grdinfo.py
index 5526a23811e..71612b459da 100644
--- a/pygmt/tests/test_grdinfo.py
+++ b/pygmt/tests/test_grdinfo.py
@@ -10,7 +10,7 @@
 
 def test_grdinfo():
     """
-    Make sure grd info works as expected.
+    Make sure grdinfo works as expected.
     """
     grid = load_earth_relief(registration="gridline")
     result = grdinfo(grid=grid, force_scan=0, per_column="n")