diff --git a/gitnexus/test/fixtures/rename-integration/r/cross-file-qualified-call/after/DESCRIPTION b/gitnexus/test/fixtures/rename-integration/r/cross-file-qualified-call/after/DESCRIPTION
new file mode 100644
index 000000000..2eb67eae1
--- /dev/null
+++ b/gitnexus/test/fixtures/rename-integration/r/cross-file-qualified-call/after/DESCRIPTION
@@ -0,0 +1,3 @@
+Package: pk
+Version: 0.1.0
+Title: Fixture
diff --git a/gitnexus/test/fixtures/rename-integration/r/cross-file-qualified-call/after/NAMESPACE b/gitnexus/test/fixtures/rename-integration/r/cross-file-qualified-call/after/NAMESPACE
new file mode 100644
index 000000000..a69898bc1
--- /dev/null
+++ b/gitnexus/test/fixtures/rename-integration/r/cross-file-qualified-call/after/NAMESPACE
@@ -0,0 +1 @@
+export(g)
diff --git a/gitnexus/test/fixtures/rename-integration/r/cross-file-qualified-call/after/R/f.R b/gitnexus/test/fixtures/rename-integration/r/cross-file-qualified-call/after/R/f.R
new file mode 100644
index 000000000..9847090f0
--- /dev/null
+++ b/gitnexus/test/fixtures/rename-integration/r/cross-file-qualified-call/after/R/f.R
@@ -0,0 +1 @@
+secret <- function() 1
diff --git a/gitnexus/test/fixtures/rename-integration/r/cross-file-qualified-call/after/R/g.R b/gitnexus/test/fixtures/rename-integration/r/cross-file-qualified-call/after/R/g.R
new file mode 100644
index 000000000..4675d7aba
--- /dev/null
+++ b/gitnexus/test/fixtures/rename-integration/r/cross-file-qualified-call/after/R/g.R
@@ -0,0 +1 @@
+g <- function() pk::secret()
diff --git a/gitnexus/test/fixtures/rename-integration/r/cross-file-qualified-call/before/DESCRIPTION b/gitnexus/test/fixtures/rename-integration/r/cross-file-qualified-call/before/DESCRIPTION
new file mode 100644
index 000000000..2eb67eae1
--- /dev/null
+++ b/gitnexus/test/fixtures/rename-integration/r/cross-file-qualified-call/before/DESCRIPTION
@@ -0,0 +1,3 @@
+Package: pk
+Version: 0.1.0
+Title: Fixture
diff --git a/gitnexus/test/fixtures/rename-integration/r/cross-file-qualified-call/before/NAMESPACE b/gitnexus/test/fixtures/rename-integration/r/cross-file-qualified-call/before/NAMESPACE
new file mode 100644
index 000000000..a69898bc1
--- /dev/null
+++ b/gitnexus/test/fixtures/rename-integration/r/cross-file-qualified-call/before/NAMESPACE
@@ -0,0 +1 @@
+export(g)
diff --git a/gitnexus/test/fixtures/rename-integration/r/cross-file-qualified-call/before/R/f.R b/gitnexus/test/fixtures/rename-integration/r/cross-file-qualified-call/before/R/f.R
new file mode 100644
index 000000000..a7179618d
--- /dev/null
+++ b/gitnexus/test/fixtures/rename-integration/r/cross-file-qualified-call/before/R/f.R
@@ -0,0 +1 @@
+hidden <- function() 1
diff --git a/gitnexus/test/fixtures/rename-integration/r/cross-file-qualified-call/before/R/g.R b/gitnexus/test/fixtures/rename-integration/r/cross-file-qualified-call/before/R/g.R
new file mode 100644
index 000000000..6bc518e5d
--- /dev/null
+++ b/gitnexus/test/fixtures/rename-integration/r/cross-file-qualified-call/before/R/g.R
@@ -0,0 +1 @@
+g <- function() pk::hidden()
diff --git a/gitnexus/test/fixtures/rename-integration/r/cross-file-qualified-call/case.json b/gitnexus/test/fixtures/rename-integration/r/cross-file-qualified-call/case.json
new file mode 100644
index 000000000..23d864288
--- /dev/null
+++ b/gitnexus/test/fixtures/rename-integration/r/cross-file-qualified-call/case.json
@@ -0,0 +1,15 @@
+{
+  "language": "r",
+  "description": "Rename a private package function that another file of the package calls as pkg::name(); the qualified call is a proven binding, so the rename crosses files.",
+  "categories": ["call-graph", "cross-file", "qualified-call", "namespace"],
+  "target": { "name": "hidden", "kind": "Function", "file": "R/f.R", "startLine": 0 },
+  "newName": "secret",
+  "expect": { "status": "success", "edits": 2 },
+  "edges": [
+    {
+      "type": "CALLS",
+      "from": { "name": "g", "kind": "Function", "file": "R/g.R", "startLine": 0 },
+      "to": { "name": "hidden", "kind": "Function", "file": "R/f.R", "startLine": 0 }
+    }
+  ]
+}
diff --git a/gitnexus/test/fixtures/rename-integration/r/string-built-name/after/dyn.R b/gitnexus/test/fixtures/rename-integration/r/string-built-name/after/dyn.R
new file mode 100644
index 000000000..48b57c712
--- /dev/null
+++ b/gitnexus/test/fixtures/rename-integration/r/string-built-name/after/dyn.R
@@ -0,0 +1,3 @@
+job <- function() 1
+
+run <- function() do.call(paste0("wor", "ker"), list())
diff --git a/gitnexus/test/fixtures/rename-integration/r/string-built-name/before/dyn.R b/gitnexus/test/fixtures/rename-integration/r/string-built-name/before/dyn.R
new file mode 100644
index 000000000..21b765a13
--- /dev/null
+++ b/gitnexus/test/fixtures/rename-integration/r/string-built-name/before/dyn.R
@@ -0,0 +1,3 @@
+worker <- function() 1
+
+run <- function() do.call(paste0("wor", "ker"), list())
diff --git a/gitnexus/test/fixtures/rename-integration/r/string-built-name/case.json b/gitnexus/test/fixtures/rename-integration/r/string-built-name/case.json
new file mode 100644
index 000000000..2c0bf3c99
--- /dev/null
+++ b/gitnexus/test/fixtures/rename-integration/r/string-built-name/case.json
@@ -0,0 +1,9 @@
+{
+  "language": "r",
+  "description": "Rename a function that is looked up only by a name built at run time (paste0); the lookup is not detected, so the rename succeeds and the lookup string keeps the old name. Documented limit.",
+  "categories": ["string-dispatch", "documented-limit"],
+  "target": { "name": "worker", "kind": "Function", "file": "dyn.R", "startLine": 0 },
+  "newName": "job",
+  "expect": { "status": "success", "edits": 1 },
+  "edges": []
+}
diff --git a/gitnexus/test/integration/rename-provider-r.test.ts b/gitnexus/test/integration/rename-provider-r.test.ts
index 637562d10..a83cec030 100644
--- a/gitnexus/test/integration/rename-provider-r.test.ts
+++ b/gitnexus/test/integration/rename-provider-r.test.ts
@@ -1,3 +1,12 @@
-import { defineRenameFixtureTests } from '../helpers/rename-integration-cases.js';
+import { describe, expect, it } from 'vitest';
+import { defineRenameFixtureTests, renameCases } from '../helpers/rename-integration-cases.js';
+
+// The fixture runner builds its test list from the directory, so an empty or renamed directory
+// would define no test and stay green. Pin the number of R cases: adding one means raising it.
+describe('R rename fixtures', () => {
+  it('are all discovered', () => {
+    expect(renameCases.filter((fixture) => fixture.language === 'r')).toHaveLength(49);
+  });
+});
 
 defineRenameFixtureTests('r');