diff --git a/.Rbuildignore b/.Rbuildignore
index 5e4a333..2be2762 100644
--- a/.Rbuildignore
+++ b/.Rbuildignore
@@ -1,2 +1,3 @@
 ^LICENSE\.md$
 ^\.github$
+_\.new\.png$
diff --git a/.gitignore b/.gitignore
index dc528e5..175c756 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,3 @@
 .Rhistory
+# {shinytest2}: Ignore new debug snapshots for `$expect_values()`
+*_.new.png
diff --git a/DESCRIPTION b/DESCRIPTION
index 4e853d7..2377716 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -32,5 +32,6 @@ Collate:
     'unipartiteNetwork.R'
     'ui.R'
 Suggests: 
+    shinytest2,
     testthat (>= 3.0.0)
 Config/testthat/edition: 3
diff --git a/tests/testthat/setup-shinytest2.R b/tests/testthat/setup-shinytest2.R
new file mode 100644
index 0000000..be65b4f
--- /dev/null
+++ b/tests/testthat/setup-shinytest2.R
@@ -0,0 +1,2 @@
+# Load application support files into testing environment
+shinytest2::load_app_env()