diff --git a/Cargo.toml b/Cargo.toml
index dcbc3e7e..01749812 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -111,6 +111,7 @@ exclude = [
     "testdata/tree/hang_when_mutated",
     "testdata/tree/insta",
     "testdata/tree/integration_tests",
+    "testdata/tree/missing_test",
     "testdata/tree/mut_ref",
     "testdata/tree/never_type",
     "testdata/tree/override_dependency",
diff --git a/testdata/tree/missing_test/Cargo.toml b/testdata/tree/missing_test/Cargo.toml
new file mode 100644
index 00000000..e12e89ca
--- /dev/null
+++ b/testdata/tree/missing_test/Cargo.toml
@@ -0,0 +1,7 @@
+[package]
+name = "cargo-mutants-testdata-missing-test"
+version = "0.0.0"
+edition = "2018"
+authors = ["Martin Pool"]
+publish = false
+
diff --git a/testdata/tree/missing_test/src/lib.rs b/testdata/tree/missing_test/src/lib.rs
new file mode 100644
index 00000000..bfb099d2
--- /dev/null
+++ b/testdata/tree/missing_test/src/lib.rs
@@ -0,0 +1,8 @@
+fn is_symlink(unix_mode: u32) -> bool {
+    unix_mode & 0o140000 != 0
+}
+
+#[test]
+fn test_symlink() {
+    assert!(is_symlink(0o147777));
+}
diff --git a/tests/cli/snapshots/cli__list_mutants_in_all_trees_as_json.snap b/tests/cli/snapshots/cli__list_mutants_in_all_trees_as_json.snap
index 33d28793..4496acff 100644
--- a/tests/cli/snapshots/cli__list_mutants_in_all_trees_as_json.snap
+++ b/tests/cli/snapshots/cli__list_mutants_in_all_trees_as_json.snap
@@ -357,6 +357,31 @@ expression: buf
 ]
 ```
 
+## testdata/tree/missing_test
+
+```json
+[
+  {
+    "package": "cargo-mutants-testdata-missing-test",
+    "file": "src/lib.rs",
+    "line": 1,
+    "function": "is_symlink",
+    "return_type": "-> bool",
+    "replacement": "true",
+    "genre": "FnValue"
+  },
+  {
+    "package": "cargo-mutants-testdata-missing-test",
+    "file": "src/lib.rs",
+    "line": 1,
+    "function": "is_symlink",
+    "return_type": "-> bool",
+    "replacement": "false",
+    "genre": "FnValue"
+  }
+]
+```
+
 ## testdata/tree/mut_ref
 
 ```json
diff --git a/tests/cli/snapshots/cli__list_mutants_in_all_trees_as_text.snap b/tests/cli/snapshots/cli__list_mutants_in_all_trees_as_text.snap
index 78027aaf..1dabb981 100644
--- a/tests/cli/snapshots/cli__list_mutants_in_all_trees_as_text.snap
+++ b/tests/cli/snapshots/cli__list_mutants_in_all_trees_as_text.snap
@@ -105,6 +105,13 @@ src/lib.rs:1: replace double -> u32 with 0
 src/lib.rs:1: replace double -> u32 with 1
 ```
 
+## testdata/tree/missing_test
+
+```
+src/lib.rs:1: replace is_symlink -> bool with true
+src/lib.rs:1: replace is_symlink -> bool with false
+```
+
 ## testdata/tree/mut_ref
 
 ```