Index: invocations-3.3.0/tests/conftest.py
===================================================================
--- invocations-3.3.0.orig/tests/conftest.py
+++ invocations-3.3.0/tests/conftest.py
@@ -5,9 +5,11 @@ from pytest import fixture
 from invoke import MockContext
 
 # Set up icecream globally for convenience.
-from icecream import install
-
-install()
+try:
+    from icecream import install
+    install()
+except ModuleNotFoundError:
+    pass
 
 
 @fixture