--- tests/test_sphinxcontrib_trio.py.orig	2020-01-02 23:06:50 +0000
+++ tests/test_sphinxcontrib_trio.py	2020-01-02 23:07:12 +0000
@@ -177,7 +177,7 @@
     shutil.copytree(str(Path(__file__).parent / "test-docs-source"),
                     str(tmpdir / "test-docs-source"))
     subprocess.run(
-        ["sphinx-build", "-v", "-nW", "-nb", "html",
+        ["sphinx-build-3", "-v", "-nW", "-nb", "html",
          str(tmpdir / "test-docs-source"), str(tmpdir / "out")])
 
     tree = lxml.html.parse(str(tmpdir / "out" / "test.html")).getroot()
@@ -235,7 +235,7 @@
                     str(tmpdir / "test-docs-source"))
 
     subprocess.run(
-        ["sphinx-build", "-v", "-nW", "-D", "autodoc_member_order=bysource", "-nb", "html",
+        ["sphinx-build-3", "-v", "-nW", "-D", "autodoc_member_order=bysource", "-nb", "html",
          str(tmpdir / "test-docs-source"), str(tmpdir / "out")])
 
     tree = lxml.html.parse(str(tmpdir / "out" / "test.html")).getroot()