diff --git a/docs/dev/clang-tidy-fixes-2026-04.md b/docs/dev/clang-tidy-fixes-2026-04.md
index 39e2a3051..79eea16b4 100644
--- a/docs/dev/clang-tidy-fixes-2026-04.md
+++ b/docs/dev/clang-tidy-fixes-2026-04.md
@@ -155,7 +155,8 @@
 - [ ] [readability-identifier-naming](https://clang.llvm.org/extra/clang-tidy/checks/readability/identifier-naming.html) (279)
 - [ ] [readability-inconsistent-declaration-parameter-name](https://clang.llvm.org/extra/clang-tidy/checks/readability/inconsistent-declaration-parameter-name.html) (7)
 - [ ] [readability-inconsistent-ifelse-braces](https://clang.llvm.org/extra/clang-tidy/checks/readability/inconsistent-ifelse-braces.html) (16)
-- [ ] [readability-isolate-declaration](https://clang.llvm.org/extra/clang-tidy/checks/readability/isolate-declaration.html) (7)
+- [x] [readability-isolate-declaration](https://clang.llvm.org/extra/clang-tidy/checks/readability/isolate-declaration.html) (7)
+  - [PR #756](https://github.com/Framework-R-D/phlex/pull/756)
 - [ ] [readability-math-missing-parentheses](https://clang.llvm.org/extra/clang-tidy/checks/readability/math-missing-parentheses.html) (6)
 - [ ] [readability-qualified-auto](https://clang.llvm.org/extra/clang-tidy/checks/readability/qualified-auto.html) (20)
 - [ ] [readability-redundant-access-specifiers](https://clang.llvm.org/extra/clang-tidy/checks/readability/redundant-access-specifiers.html) (3)
diff --git a/plugins/python/src/errorwrap.cpp b/plugins/python/src/errorwrap.cpp
index 77e972c91..1ff3901b8 100644
--- a/plugins/python/src/errorwrap.cpp
+++ b/plugins/python/src/errorwrap.cpp
@@ -74,7 +74,9 @@ bool phlex::experimental::msg_from_py_error(std::string& msg, bool check_error)
   }
 
 #if PY_VERSION_HEX < 0x30c000000
-  PyObject *type = nullptr, *value = nullptr, *traceback = nullptr;
+  PyObject* type = nullptr;
+  PyObject* value = nullptr;
+  PyObject* traceback = nullptr;
   PyErr_Fetch(&type, &value, &traceback);
   if (value) {
     bool tb_ok = format_traceback(msg, type, value, traceback);
diff --git a/plugins/python/src/modulewrap.cpp b/plugins/python/src/modulewrap.cpp
index b21c5d84e..087a7f822 100644
--- a/plugins/python/src/modulewrap.cpp
+++ b/plugins/python/src/modulewrap.cpp
@@ -774,7 +774,10 @@ static PyObject* parse_args(PyObject* args,
   static std::array<char const*, 6> const kwnames{
     "callable", "input_family", "output_product_suffixes", "concurrency", "name", nullptr};
 #endif
-  PyObject *callable = nullptr, *input = nullptr, *output = nullptr, *pyname = nullptr;
+  PyObject* callable = nullptr;
+  PyObject* input = nullptr;
+  PyObject* output = nullptr;
+  PyObject* pyname = nullptr;
   int nconcur_ = -1;
   if (!PyArg_ParseTupleAndKeywords(
         args, kwds, "OO|OiO", std::data(kwnames), &callable, &input, &output, &nconcur_, &pyname)) {
@@ -1020,7 +1023,9 @@ static PyObject* md_transform(py_phlex_module* mod, PyObject* args, PyObject* kw
 
   std::string cname;
   std::vector<product_selector> input_selectors;
-  std::vector<std::string> input_types, output_suffixes, output_types;
+  std::vector<std::string> input_types;
+  std::vector<std::string> output_suffixes;
+  std::vector<std::string> output_types;
   auto nconcur = (concurrency)-1;
   PyObject* callable = parse_args(
     args, kwds, cname, input_selectors, input_types, output_suffixes, output_types, nconcur);
@@ -1164,7 +1169,9 @@ static PyObject* md_observe(py_phlex_module* mod, PyObject* args, PyObject* kwds
 
   std::string cname;
   std::vector<product_selector> input_selectors;
-  std::vector<std::string> input_types, output_suffixes, output_types;
+  std::vector<std::string> input_types;
+  std::vector<std::string> output_suffixes;
+  std::vector<std::string> output_types;
   auto nconcur = (concurrency)-1;
   PyObject* callable = parse_args(
     args, kwds, cname, input_selectors, input_types, output_suffixes, output_types, nconcur);
@@ -1337,7 +1344,9 @@ static PyObject* sc_provide(py_phlex_source* src, PyObject* args, PyObject* kwds
 #else
   static std::array<char const*, 4> const kwnames{"callable", "output_product", "name", nullptr};
 #endif
-  PyObject *callable = nullptr, *output = nullptr, *pyname = nullptr;
+  PyObject* callable = nullptr;
+  PyObject* output = nullptr;
+  PyObject* pyname = nullptr;
   if (!PyArg_ParseTupleAndKeywords(
         args, kwds, "OO|O", std::data(kwnames), &callable, &output, &pyname)) {
     // error already set by argument parser
diff --git a/test/form/reader.cpp b/test/form/reader.cpp
index 44c44689f..a1477963b 100644
--- a/test/form/reader.cpp
+++ b/test/form/reader.cpp
@@ -55,7 +55,8 @@ int main(int argc, char** argv)
     iss >> type;
     if (type == "SEG") {
       SegChecksum cs{};
-      int nevent{}, nseg{};
+      int nevent{};
+      int nseg{};
       iss >> nevent >> nseg >> cs.check >> cs.cpx >> cs.cpy >> cs.cpz;
       expected_seg[{nevent, nseg}] = cs;
     } else if (type == "EVT") {