diff --git a/gegl/tests/bloom.rs b/gegl/tests/bloom.rs
new file mode 100644
index 0000000..5d8c2d8
--- /dev/null
+++ b/gegl/tests/bloom.rs
@@ -0,0 +1,25 @@
+use {
+  gegl::{Bloom, GeglOperation},
+  insta::assert_debug_snapshot,
+};
+
+#[test]
+fn test_bloom_graph() {
+  let mut graphs = vec![];
+
+  let op = Bloom {
+    limit_exposure: true,
+    radius: 100_f64,
+    softness: 100_f64,
+    ..Default::default()
+  };
+
+  let default = Bloom::default();
+
+  graphs.push(("non-default: exclude defaults", op.graph(false)));
+  graphs.push(("non-default: include defaults", op.graph(true)));
+  graphs.push(("default: exclude defaults", default.graph(false)));
+  graphs.push(("default: include defaults", default.graph(true)));
+
+  assert_debug_snapshot!("graphs", graphs);
+}
diff --git a/gegl/tests/cartoon.rs b/gegl/tests/cartoon.rs
new file mode 100644
index 0000000..5fc35d6
--- /dev/null
+++ b/gegl/tests/cartoon.rs
@@ -0,0 +1,23 @@
+use {
+  gegl::{Cartoon, GeglOperation},
+  insta::assert_debug_snapshot,
+};
+
+#[test]
+fn test_cartoon_graph() {
+  let mut graphs = vec![];
+
+  let op = Cartoon {
+    mask_radius: 0.1,
+    ..Default::default()
+  };
+
+  let default = Cartoon::default();
+
+  graphs.push(("non-default: exclude defaults", op.graph(false)));
+  graphs.push(("non-default: include defaults", op.graph(true)));
+  graphs.push(("default: exclude defaults", default.graph(false)));
+  graphs.push(("default: include defaults", default.graph(true)));
+
+  assert_debug_snapshot!("graphs", graphs);
+}
diff --git a/gegl/tests/snapshots/bloom__graphs.snap b/gegl/tests/snapshots/bloom__graphs.snap
new file mode 100644
index 0000000..d3972cc
--- /dev/null
+++ b/gegl/tests/snapshots/bloom__graphs.snap
@@ -0,0 +1,43 @@
+---
+source: gegl/tests/bloom.rs
+expression: graphs
+---
+[
+    (
+        "non-default: exclude defaults",
+        [
+            "gegl:bloom",
+            "limit_exposure=true",
+            "radius=100",
+            "softness=100",
+        ],
+    ),
+    (
+        "non-default: include defaults",
+        [
+            "gegl:bloom",
+            "limit_exposure=true",
+            "radius=100",
+            "softness=100",
+            "strength=50",
+            "threshold=50",
+        ],
+    ),
+    (
+        "default: exclude defaults",
+        [
+            "gegl:bloom",
+        ],
+    ),
+    (
+        "default: include defaults",
+        [
+            "gegl:bloom",
+            "limit_exposure=false",
+            "radius=10",
+            "softness=25",
+            "strength=50",
+            "threshold=50",
+        ],
+    ),
+]
diff --git a/gegl/tests/snapshots/cartoon__graphs.snap b/gegl/tests/snapshots/cartoon__graphs.snap
new file mode 100644
index 0000000..3040ce7
--- /dev/null
+++ b/gegl/tests/snapshots/cartoon__graphs.snap
@@ -0,0 +1,35 @@
+---
+source: gegl/tests/cartoon.rs
+expression: graphs
+---
+[
+    (
+        "non-default: exclude defaults",
+        [
+            "gegl:cartoon",
+            "mask_radius=0.1",
+        ],
+    ),
+    (
+        "non-default: include defaults",
+        [
+            "gegl:cartoon",
+            "mask_radius=0.1",
+            "pct_black=0.2",
+        ],
+    ),
+    (
+        "default: exclude defaults",
+        [
+            "gegl:cartoon",
+        ],
+    ),
+    (
+        "default: include defaults",
+        [
+            "gegl:cartoon",
+            "mask_radius=7",
+            "pct_black=0.2",
+        ],
+    ),
+]