diff --git a/apps/admin-api/src/error.rs b/apps/admin-api/src/error.rs
index f7a2e43..46c8eb5 100644
--- a/apps/admin-api/src/error.rs
+++ b/apps/admin-api/src/error.rs
@@ -448,62 +448,3 @@ pub fn runtime_error_context(error: &RuntimeError) -> Option<Value> {
         _ => None,
     }
 }
-
-#[cfg(test)]
-mod tests {
-    use serde_json::json;
-
-    use super::{runtime_error_context, runtime_test_failure};
-    use crank_runtime::RuntimeError;
-
-    #[test]
-    fn runtime_test_failure_includes_structured_context() {
-        let payload = runtime_test_failure(&RuntimeError::InvalidPreparedRequest {
-            field: "request.headers".to_owned(),
-            reason: "must be an object".to_owned(),
-        });
-
-        assert_eq!(payload["code"], "runtime_request_error");
-        assert_eq!(
-            payload["context"],
-            json!({
-                "field": "request.headers",
-                "reason": "must be an object"
-            })
-        );
-    }
-
-    #[test]
-    fn runtime_error_context_includes_secret_crypto_operation() {
-        let context = runtime_error_context(&RuntimeError::SecretCrypto {
-            operation: "decode secret envelope",
-            details: "bad base64".to_owned(),
-        })
-        .unwrap();
-
-        assert_eq!(
-            context,
-            json!({
-                "operation": "decode secret envelope",
-                "details": "bad base64"
-            })
-        );
-    }
-
-    #[test]
-    fn runtime_test_failure_includes_runtime_overload_context() {
-        let payload = runtime_test_failure(&RuntimeError::ConcurrencyLimitExceeded {
-            kind: "window",
-            limit: 16,
-        });
-
-        assert_eq!(payload["code"], "runtime_overloaded");
-        assert_eq!(
-            payload["context"],
-            json!({
-                "kind": "window",
-                "limit": 16
-            })
-        );
-    }
-}
diff --git a/apps/admin-api/tests/unit.rs b/apps/admin-api/tests/unit.rs
new file mode 100644
index 0000000..1b31879
--- /dev/null
+++ b/apps/admin-api/tests/unit.rs
@@ -0,0 +1,2 @@
+#[path = "unit/error.rs"]
+mod error;
diff --git a/apps/admin-api/tests/unit/error.rs b/apps/admin-api/tests/unit/error.rs
new file mode 100644
index 0000000..1ab2aba
--- /dev/null
+++ b/apps/admin-api/tests/unit/error.rs
@@ -0,0 +1,54 @@
+use admin_api::error::{runtime_error_context, runtime_test_failure};
+use crank_runtime::RuntimeError;
+use serde_json::json;
+
+#[test]
+fn runtime_test_failure_includes_structured_context() {
+    let payload = runtime_test_failure(&RuntimeError::InvalidPreparedRequest {
+        field: "request.headers".to_owned(),
+        reason: "must be an object".to_owned(),
+    });
+
+    assert_eq!(payload["code"], "runtime_request_error");
+    assert_eq!(
+        payload["context"],
+        json!({
+            "field": "request.headers",
+            "reason": "must be an object"
+        })
+    );
+}
+
+#[test]
+fn runtime_error_context_includes_secret_crypto_operation() {
+    let context = runtime_error_context(&RuntimeError::SecretCrypto {
+        operation: "decode secret envelope",
+        details: "bad base64".to_owned(),
+    })
+    .unwrap();
+
+    assert_eq!(
+        context,
+        json!({
+            "operation": "decode secret envelope",
+            "details": "bad base64"
+        })
+    );
+}
+
+#[test]
+fn runtime_test_failure_includes_runtime_overload_context() {
+    let payload = runtime_test_failure(&RuntimeError::ConcurrencyLimitExceeded {
+        kind: "window",
+        limit: 16,
+    });
+
+    assert_eq!(payload["code"], "runtime_overloaded");
+    assert_eq!(
+        payload["context"],
+        json!({
+            "kind": "window",
+            "limit": 16
+        })
+    );
+}