diff --git a/pyproject.toml b/pyproject.toml
index 3dc1d49c..ff0c0d1b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -63,7 +63,7 @@ write_to = "src/cutadapt/_version.py"
 warn_unused_configs = true
 
 [tool.cibuildwheel]
-environment = "CFLAGS=-g0"
+environment = {"CFLAGS" = "-g0", "PYTEST_ADDOPTS" = "--doctest-ignore-import-errors"}
 test-extras = ["dev"]
 test-command = ["pytest {project}"]