diff --git a/unexported/testdata/src/a/a.go b/unexported/testdata/src/a/a.go
deleted file mode 100644
index e214fb4..0000000
--- a/unexported/testdata/src/a/a.go
+++ /dev/null
@@ -1,239 +0,0 @@
-package a
-
-import (
-	"io"
-)
-
-// unexportedReader is an unexported interface.
-type unexportedReader interface {
-	Read([]byte) (int, error)
-}
-
-// ExportedWriter is an exported interface.
-type ExportedWriter interface {
-	Write([]byte) (int, error)
-}
-
-// 1. Function with unexported arg type interface
-func ReadAll(r unexportedReader) ([]byte, error) { // want "unexported interface 'unexportedReader' used as parameter in exported function 'ReadAll'"
-	buf := make([]byte, 1024)
-	_, err := r.Read(buf)
-	return buf, err
-}
-
-//iface:ignore=unexported
-func ReadAllIgnored(r unexportedReader) ([]byte, error) {
-	buf := make([]byte, 1024)
-	_, err := r.Read(buf)
-	return buf, err
-}
-
-// 2. Function with exported arg type interface
-func WriteHello(w ExportedWriter) error {
-	_, err := w.Write([]byte("hello"))
-	return err
-}
-
-// 3. Function with unexported return type interface
-func NewUnexportedReader() unexportedReader { // want "unexported interface 'unexportedReader' used as return value in exported function 'NewUnexportedReader'"
-	return nil // stub
-}
-
-//iface:ignore=unexported
-func NewUnexportedReaderIgnored() unexportedReader {
-	return nil // stub
-}
-
-// 4. Function with exported return type interface
-func NewWriter() ExportedWriter {
-	return nil // stub
-}
-
-// 5. Function with both unexported arg and return type interface
-func WrapReader(r unexportedReader) unexportedReader { // want "unexported interface 'unexportedReader' used as parameter in exported function 'WrapReader'" "unexported interface 'unexportedReader' used as return value in exported function 'WrapReader'"
-	return r
-}
-
-// 6. Function with both exported arg and return type interface
-func WrapWriter(w ExportedWriter) ExportedWriter {
-	return w
-}
-
-// 7. Function with unexported arg type interface and exported return type interface
-func PromoteReader(r unexportedReader) ExportedWriter { // want "unexported interface 'unexportedReader' used as parameter in exported function 'PromoteReader'"
-	return nil // stub
-}
-
-// 8. Function with exported arg type interface and unexported return type interface
-func DemoteWriter(w ExportedWriter) unexportedReader { // want "unexported interface 'unexportedReader' used as return value in exported function 'DemoteWriter'"
-	return nil // stub
-}
-
-// 9. Function with external arg type interface (io.Writer)
-func WriteToExternal(w io.Writer) error {
-	_, err := w.Write([]byte("external"))
-	return err
-}
-
-// 10. Function with external return type interface (io.Writer)
-func NewExternalWriter() io.Writer {
-	return nil // stub
-}
-
-// 11. Function with both external arg and return type interface (io.Writer)
-func WrapExternalWriter(w io.Writer) io.Writer {
-	return w
-}
-
-// 12. Function with any arg type
-func Print(a any) {
-}
-
-// 13. Function witn interface{} arg type
-func Write(i interface{}) {
-}
-
-// 14. Function with error arg type
-func Capture(err error) {}
-
-// 15. Function with no arg and no return type interface
-func Ping() {}
-
-// 16. Function with primitive arg type
-func AddOne(x int) int {
-	return x + 1
-}
-
-// 17. Function with primitive return type
-func GetZero() int {
-	return 0
-}
-
-// 18. Function with both primitive arg and return type
-func Double(x int) int {
-	return x * 2
-}
-
-// 19. Function with pointer to unexported interface parameter
-func ReadPtr(r *unexportedReader) ([]byte, error) { // want `unexported interface '\*unexportedReader' used as parameter in exported function 'ReadPtr'`
-	return nil, nil
-}
-
-// 20. Function with pointer to unexported interface return value
-func NewReaderPtr() *unexportedReader { // want `unexported interface '\*unexportedReader' used as return value in exported function 'NewReaderPtr'`
-	return nil
-}
-
-// 21. Function with pointer to unexported interface both param and return
-func WrapReaderPtr(r *unexportedReader) *unexportedReader { // want `unexported interface '\*unexportedReader' used as parameter in exported function 'WrapReaderPtr'` `unexported interface '\*unexportedReader' used as return value in exported function 'WrapReaderPtr'`
-	return r
-}
-
-// 22. Function with pointer to pointer to unexported interface
-func ReadPtrPtr(r **unexportedReader) { // want `unexported interface '\*\*unexportedReader' used as parameter in exported function 'ReadPtrPtr'`
-}
-
-// 23. Function with pointer to exported interface — no diagnostic
-func ReadExportedPtr(r *ExportedWriter) {}
-
-// 24. Function with pointer to external interface — no diagnostic
-func ReadExtPtr(r *io.Writer) {}
-
-// 25. Function with variadic unexported interface parameter
-func ServeClient(h ...unexportedReader) {} // want `unexported interface '...unexportedReader' used as parameter in exported function 'ServeClient'`
-
-// 26. Function with variadic exported interface — no diagnostic
-func ServeExportedVariadic(w ...ExportedWriter) {}
-
-// 27. Function with variadic any — no diagnostic
-func ServeOK(h ...any) {}
-
-// 28. Function with variadic error — no diagnostic
-func ServeErr(h ...error) {}
-
-// 29. Function with variadic pointer to unexported interface (nested wrapping)
-func ServeVariadicPtr(h ...*unexportedReader) {} // want `unexported interface '...\*unexportedReader' used as parameter in exported function 'ServeVariadicPtr'`
-
-// 30. Function with slice of unexported interface parameter
-func ReadMany(r []unexportedReader) {} // want `unexported interface '\[\]unexportedReader' used as parameter in exported function 'ReadMany'`
-
-// 31. Function with slice of unexported interface return value
-func NewReaderSlice() []unexportedReader { return nil } // want `unexported interface '\[\]unexportedReader' used as return value in exported function 'NewReaderSlice'`
-
-// 32. Function with slice of unexported interface both param and return
-func TransformReaders(r []unexportedReader) []unexportedReader { return r } // want `unexported interface '\[\]unexportedReader' used as parameter in exported function 'TransformReaders'` `unexported interface '\[\]unexportedReader' used as return value in exported function 'TransformReaders'`
-
-// 33. Function with slice of exported interface — no diagnostic
-func ReadSliceExported(r []ExportedWriter) {}
-
-// 34. Function with slice of external interface — no diagnostic
-func ReadSliceExt(r []io.Writer) {}
-
-// 35. Function with array of unexported interface parameter
-func ReadFixed(r [4]unexportedReader) {} // want `unexported interface '\[4\]unexportedReader' used as parameter in exported function 'ReadFixed'`
-
-// 36. Function with array of unexported interface return value
-func NewReaderArray() [2]unexportedReader { return [2]unexportedReader{} } // want `unexported interface '\[2\]unexportedReader' used as return value in exported function 'NewReaderArray'`
-
-// 37. Function with array of exported interface — no diagnostic
-func ReadArrayExported(r [4]ExportedWriter) {}
-
-// 38. Function with array of external interface — no diagnostic
-func ReadArrayExt(r [4]io.Writer) {}
-
-// 39. Function with receive-only channel of unexported interface parameter
-func ReadChan(r <-chan unexportedReader) {} // want `unexported interface '<-chan unexportedReader' used as parameter in exported function 'ReadChan'`
-
-// 40. Function with send-only channel of unexported interface parameter
-func WriteChan(r chan<- unexportedReader) {} // want `unexported interface 'chan<- unexportedReader' used as parameter in exported function 'WriteChan'`
-
-// 41. Function with bidirectional channel of unexported interface parameter
-func BidiChan(r chan unexportedReader) {} // want `unexported interface 'chan unexportedReader' used as parameter in exported function 'BidiChan'`
-
-// 42. Function with receive-only channel of unexported interface return value
-func NewReaderChan() <-chan unexportedReader { return nil } // want `unexported interface '<-chan unexportedReader' used as return value in exported function 'NewReaderChan'`
-
-// 43. Function with send-only channel of unexported interface return value
-func NewReaderChanSend() chan<- unexportedReader { return nil } // want `unexported interface 'chan<- unexportedReader' used as return value in exported function 'NewReaderChanSend'`
-
-// 44. Function with channel of exported interface — no diagnostic
-func ReadChanExported(r <-chan ExportedWriter) {}
-
-// 45. Function with channel of external interface — no diagnostic
-func ReadChanExt(r <-chan io.Writer) {}
-
-// 46. Function with map value is unexported interface parameter
-func ReadMapVal(r map[string]unexportedReader) {} // want `unexported interface 'map\[string\]unexportedReader' used as parameter in exported function 'ReadMapVal'`
-
-// 47. Function with map value is unexported interface return value
-func NewReaderMapVal() map[string]unexportedReader { return nil } // want `unexported interface 'map\[string\]unexportedReader' used as return value in exported function 'NewReaderMapVal'`
-
-// 48. Function with map of exported interface — no diagnostic
-func ReadMapExported(r map[string]ExportedWriter) {}
-
-// 49. Function with map of external interface — no diagnostic
-func ReadMapExt(r map[string]io.Writer) {}
-
-// 50. Function with pointer to slice of unexported interface (nested wrapping)
-func ReadPtrSlice(r *[]unexportedReader) {} // want `unexported interface '\*\[\]unexportedReader' used as parameter in exported function 'ReadPtrSlice'`
-
-// 51. Function with pointer to pointer to slice of unexported interface (nested wrapping)
-func ReadPtrPtrSlice(r **[]unexportedReader) {} // want `unexported interface '\*\*\[\]unexportedReader' used as parameter in exported function 'ReadPtrPtrSlice'`
-
-// 52. Function with pointer to slice of unexported interface as return value
-func NewReaderPtrSlice() *[]unexportedReader { return nil } // want `unexported interface '\*\[\]unexportedReader' used as return value in exported function 'NewReaderPtrSlice'`
-
-// 53. Function with slice of pointer to unexported interface
-func ReadSlicePtr(r []*unexportedReader) {} // want `unexported interface '\[\]\*unexportedReader' used as parameter in exported function 'ReadSlicePtr'`
-
-// 54. Function with pointer to slice of external interface — no diagnostic
-func ReadPtrSliceExt(r *[]io.Writer) {}
-
-// 55. Function with pointer to slice of exported interface — no diagnostic
-func ReadPtrSliceExported(r *[]ExportedWriter) {}
-
-// 56. Function with slice of pointer to external interface — no diagnostic
-func ReadSlicePtrExt(r []*io.Writer) {}
-
-// 57. Function with slice of pointer to exported interface — no diagnostic
-func ReadSlicePtrExported(r []*ExportedWriter) {}
diff --git a/unexported/testdata/src/b/b.go b/unexported/testdata/src/b/b.go
deleted file mode 100644
index fa6d67f..0000000
--- a/unexported/testdata/src/b/b.go
+++ /dev/null
@@ -1,253 +0,0 @@
-package b
-
-import "io"
-
-// unexportedReader is an unexported interface.
-type unexportedReader interface {
-	Read([]byte) (int, error)
-}
-
-// ExportedWriter is an exported interface.
-type ExportedWriter interface {
-	Write([]byte) (int, error)
-}
-
-// ExportedType is an exported struct type.
-type ExportedType struct{}
-
-// 1. Method with unexported arg type interface
-func (e *ExportedType) ReadAll(r unexportedReader) ([]byte, error) { // want "unexported interface 'unexportedReader' used as parameter in exported method 'ExportedType.ReadAll'"
-	buf := make([]byte, 1024)
-	_, err := r.Read(buf)
-	return buf, err
-}
-
-//iface:ignore=unexported
-func (e *ExportedType) ReadAllIgnored(r unexportedReader) ([]byte, error) {
-	buf := make([]byte, 1024)
-	_, err := r.Read(buf)
-	return buf, err
-}
-
-// 2. Method with exported arg type interface
-func (e *ExportedType) WriteHello(w ExportedWriter) error {
-	_, err := w.Write([]byte("hello"))
-	return err
-}
-
-// 3. Method with unexported return type interface
-func (e *ExportedType) NewUnexportedReader() unexportedReader { // want "unexported interface 'unexportedReader' used as return value in exported method 'ExportedType.NewUnexportedReader'"
-	return nil // stub
-}
-
-//iface:ignore=unexported
-func (e *ExportedType) NewUnexportedReaderIgnored() unexportedReader {
-	return nil // stub
-}
-
-// 4. Method with exported return type interface
-func (e *ExportedType) NewWriter() ExportedWriter {
-	return nil // stub
-}
-
-// 5. Method with both unexported arg and return type interface
-func (e *ExportedType) WrapReader(r unexportedReader) unexportedReader { // want "unexported interface 'unexportedReader' used as parameter in exported method 'ExportedType.WrapReader'" "unexported interface 'unexportedReader' used as return value in exported method 'ExportedType.WrapReader'"
-	return r
-}
-
-// 6. Method with both exported arg and return type interface
-func (e *ExportedType) WrapWriter(w ExportedWriter) ExportedWriter {
-	return w
-}
-
-// 7. Method with unexported arg type interface and exported return type interface
-func (e *ExportedType) PromoteReader(r unexportedReader) ExportedWriter { // want "unexported interface 'unexportedReader' used as parameter in exported method 'ExportedType.PromoteReader'"
-	return nil // stub
-}
-
-// 8. Method with exported arg type interface and unexported return type interface
-func (e *ExportedType) DemoteWriter(w ExportedWriter) unexportedReader { // want "unexported interface 'unexportedReader' used as return value in exported method 'ExportedType.DemoteWriter'"
-	return nil // stub
-}
-
-// 9. Method with external arg type interface (io.Writer)
-func (e *ExportedType) WriteToExternal(w io.Writer) error {
-	_, err := w.Write([]byte("external"))
-	return err
-}
-
-// 10. Method with external return type interface (io.Writer)
-func (e *ExportedType) NewExternalWriter() io.Writer {
-	return nil // stub
-}
-
-// 11. Method with both external arg and return type interface (io.Writer)
-func (e *ExportedType) WrapExternalWriter(w io.Writer) io.Writer {
-	return w
-}
-
-// 13. Method with any arg type
-func (e *ExportedType) Print(a any) {
-}
-
-// 14. Method with interface{} arg type
-func (e *ExportedType) Write(i interface{}) {
-}
-
-// 15. Method with error arg type
-func (e *ExportedType) Capture(err error) {}
-
-// 16. Method with no arg and no return type interface
-func (e *ExportedType) Ping() {}
-
-// 17. Method with primitive arg type
-func (e *ExportedType) AddOne(x int) int {
-	return x + 1
-}
-
-// 18. Method with primitive return type
-func (e *ExportedType) GetZero() int {
-	return 0
-}
-
-// 19. Method with both primitive arg and return type
-func (e *ExportedType) Double(x int) int {
-	return x * 2
-}
-
-// 20. Method with pointer to unexported interface parameter
-func (e *ExportedType) ReadPtr(r *unexportedReader) ([]byte, error) { // want `unexported interface '\*unexportedReader' used as parameter in exported method 'ExportedType.ReadPtr'`
-	return nil, nil
-}
-
-// 21. Method with pointer to unexported interface return value
-func (e *ExportedType) NewReaderPtr() *unexportedReader { // want `unexported interface '\*unexportedReader' used as return value in exported method 'ExportedType.NewReaderPtr'`
-	return nil
-}
-
-// 22. Method with pointer to unexported interface both param and return
-func (e *ExportedType) WrapReaderPtr(r *unexportedReader) *unexportedReader { // want `unexported interface '\*unexportedReader' used as parameter in exported method 'ExportedType.WrapReaderPtr'` `unexported interface '\*unexportedReader' used as return value in exported method 'ExportedType.WrapReaderPtr'`
-	return r
-}
-
-// 23. Method with pointer to pointer to unexported interface
-func (e *ExportedType) ReadPtrPtr(r **unexportedReader) { // want `unexported interface '\*\*unexportedReader' used as parameter in exported method 'ExportedType.ReadPtrPtr'`
-}
-
-// 24. Method with pointer to exported interface — no diagnostic
-func (e *ExportedType) ReadExportedPtr(r *ExportedWriter) {}
-
-// 25. Method with pointer to external interface — no diagnostic
-func (e *ExportedType) ReadExtPtr(r *io.Writer) {}
-
-// 26. Method with variadic unexported interface parameter
-func (e *ExportedType) ServeClient(h ...unexportedReader) {} // want `unexported interface '...unexportedReader' used as parameter in exported method 'ExportedType.ServeClient'`
-
-// 27. Method with variadic exported interface — no diagnostic
-func (e *ExportedType) ServeExportedVariadic(w ...ExportedWriter) {}
-
-// 28. Method with variadic pointer to unexported interface (nested wrapping)
-func (e *ExportedType) ServeVariadicPtr(h ...*unexportedReader) {} // want `unexported interface '...\*unexportedReader' used as parameter in exported method 'ExportedType.ServeVariadicPtr'`
-
-// 29. Method with slice of unexported interface parameter
-func (e *ExportedType) ReadMany(r []unexportedReader) {} // want `unexported interface '\[\]unexportedReader' used as parameter in exported method 'ExportedType.ReadMany'`
-
-// 30. Method with slice of unexported interface return value
-func (e *ExportedType) NewReaderSlice() []unexportedReader { return nil } // want `unexported interface '\[\]unexportedReader' used as return value in exported method 'ExportedType.NewReaderSlice'`
-
-// 31. Method with slice of unexported interface both param and return
-func (e *ExportedType) TransformReaders(r []unexportedReader) []unexportedReader { return r } // want `unexported interface '\[\]unexportedReader' used as parameter in exported method 'ExportedType.TransformReaders'` `unexported interface '\[\]unexportedReader' used as return value in exported method 'ExportedType.TransformReaders'`
-
-// 32. Method with slice of exported interface — no diagnostic
-func (e *ExportedType) ReadSliceExported(r []ExportedWriter) {}
-
-// 33. Method with slice of external interface — no diagnostic
-func (e *ExportedType) ReadSliceExt(r []io.Writer) {}
-
-// 34. Method with array of unexported interface parameter
-func (e *ExportedType) ReadFixed(r [4]unexportedReader) {} // want `unexported interface '\[4\]unexportedReader' used as parameter in exported method 'ExportedType.ReadFixed'`
-
-// 35. Method with array of unexported interface return value
-func (e *ExportedType) NewReaderArray() [2]unexportedReader { return [2]unexportedReader{} } // want `unexported interface '\[2\]unexportedReader' used as return value in exported method 'ExportedType.NewReaderArray'`
-
-// 36. Method with array of exported interface — no diagnostic
-func (e *ExportedType) ReadArrayExported(r [4]ExportedWriter) {}
-
-// 37. Method with array of external interface — no diagnostic
-func (e *ExportedType) ReadArrayExt(r [4]io.Writer) {}
-
-// 38. Method with receive-only channel of unexported interface parameter
-func (e *ExportedType) ReadChan(r <-chan unexportedReader) {} // want `unexported interface '<-chan unexportedReader' used as parameter in exported method 'ExportedType.ReadChan'`
-
-// 39. Method with send-only channel of unexported interface parameter
-func (e *ExportedType) WriteChan(r chan<- unexportedReader) {} // want `unexported interface 'chan<- unexportedReader' used as parameter in exported method 'ExportedType.WriteChan'`
-
-// 40. Method with bidirectional channel of unexported interface parameter
-func (e *ExportedType) BidiChan(r chan unexportedReader) {} // want `unexported interface 'chan unexportedReader' used as parameter in exported method 'ExportedType.BidiChan'`
-
-// 41. Method with receive-only channel of unexported interface return value
-func (e *ExportedType) NewReaderChan() <-chan unexportedReader { return nil } // want `unexported interface '<-chan unexportedReader' used as return value in exported method 'ExportedType.NewReaderChan'`
-
-// 42. Method with send-only channel of unexported interface return value
-func (e *ExportedType) NewReaderChanSend() chan<- unexportedReader { return nil } // want `unexported interface 'chan<- unexportedReader' used as return value in exported method 'ExportedType.NewReaderChanSend'`
-
-// 43. Method with channel of exported interface — no diagnostic
-func (e *ExportedType) ReadChanExported(r <-chan ExportedWriter) {}
-
-// 44. Method with channel of external interface — no diagnostic
-func (e *ExportedType) ReadChanExt(r <-chan io.Writer) {}
-
-// 45. Method with map value is unexported interface parameter
-func (e *ExportedType) ReadMapVal(r map[string]unexportedReader) {} // want `unexported interface 'map\[string\]unexportedReader' used as parameter in exported method 'ExportedType.ReadMapVal'`
-
-// 46. Method with map value is unexported interface return value
-func (e *ExportedType) NewReaderMapVal() map[string]unexportedReader { return nil } // want `unexported interface 'map\[string\]unexportedReader' used as return value in exported method 'ExportedType.NewReaderMapVal'`
-
-// 47. Method with map of exported interface — no diagnostic
-func (e *ExportedType) ReadMapExported(r map[string]ExportedWriter) {}
-
-// 48. Method with map of external interface — no diagnostic
-func (e *ExportedType) ReadMapExt(r map[string]io.Writer) {}
-
-// 49. Method with pointer to slice of unexported interface (nested wrapping)
-func (e *ExportedType) ReadPtrSlice(r *[]unexportedReader) {} // want `unexported interface '\*\[\]unexportedReader' used as parameter in exported method 'ExportedType.ReadPtrSlice'`
-
-// 50. Method with pointer to pointer to slice of unexported interface (nested wrapping)
-func (e *ExportedType) ReadPtrPtrSlice(r **[]unexportedReader) {} // want `unexported interface '\*\*\[\]unexportedReader' used as parameter in exported method 'ExportedType.ReadPtrPtrSlice'`
-
-// 51. Method with pointer to slice of unexported interface as return value
-func (e *ExportedType) NewReaderPtrSlice() *[]unexportedReader { return nil } // want `unexported interface '\*\[\]unexportedReader' used as return value in exported method 'ExportedType.NewReaderPtrSlice'`
-
-// 52. Method with slice of pointer to unexported interface
-func (e *ExportedType) ReadSlicePtr(r []*unexportedReader) {} // want `unexported interface '\[\]\*unexportedReader' used as parameter in exported method 'ExportedType.ReadSlicePtr'`
-
-// 53. Method with pointer to slice of external interface — no diagnostic
-func (e *ExportedType) ReadPtrSliceExt(r *[]io.Writer) {}
-
-// 54. Method with pointer to slice of exported interface — no diagnostic
-func (e *ExportedType) ReadPtrSliceExported(r *[]ExportedWriter) {}
-
-// 55. Method with slice of pointer to external interface — no diagnostic
-func (e *ExportedType) ReadSlicePtrExt(r []*io.Writer) {}
-
-// 56. Method with slice of pointer to exported interface — no diagnostic
-func (e *ExportedType) ReadSlicePtrExported(r []*ExportedWriter) {}
-
-// 57. Generic receiver with unexported interface parameter
-type GenericType[T any] struct{}
-
-func (g *GenericType[T]) Process(r unexportedReader) {} // want "unexported interface 'unexportedReader' used as parameter in exported method 'GenericType\\[T\\].Process'"
-
-// 58. Generic receiver with unexported interface return value
-func (g *GenericType[T]) NewReader() unexportedReader { return nil } // want "unexported interface 'unexportedReader' used as return value in exported method 'GenericType\\[T\\].NewReader'"
-
-// 59. Generic receiver with both unexported interface param and return
-func (g *GenericType[T]) WrapReader(r unexportedReader) unexportedReader { return r } // want "unexported interface 'unexportedReader' used as parameter in exported method 'GenericType\\[T\\].WrapReader'" "unexported interface 'unexportedReader' used as return value in exported method 'GenericType\\[T\\].WrapReader'"
-
-// 60. Pointer to generic receiver with unexported interface parameter
-func (g *GenericType[T]) ProcessPtr(r unexportedReader) {} // want "unexported interface 'unexportedReader' used as parameter in exported method 'GenericType\\[T\\].ProcessPtr'"
-
-// 61. Multi-param generic receiver with unexported interface parameter
-type MultiGenericType[T, U any] struct{}
-
-func (m *MultiGenericType[T, U]) Handle(r unexportedReader) {} // want "unexported interface 'unexportedReader' used as parameter in exported method 'MultiGenericType\\[T, U\\].Handle'"
diff --git a/unexported/testdata/src/fun/fun.go b/unexported/testdata/src/fun/fun.go
new file mode 100644
index 0000000..e063dbd
--- /dev/null
+++ b/unexported/testdata/src/fun/fun.go
@@ -0,0 +1,123 @@
+package fun
+
+import (
+	"fmt"
+	"io"
+	"os"
+)
+
+type execer interface {
+	Exec() (any, error)
+}
+
+type Caller interface {
+	Call() (any, error)
+}
+
+type AddTask struct {
+	a int
+	b int
+}
+
+func (t *AddTask) Exec() (any, error) {
+	return t.a + t.b, nil
+}
+
+type CallFunc func() (any, error)
+
+func (cf CallFunc) Call() (any, error) {
+	return cf()
+}
+
+func ExecAdd(a, b int) execer { // want "^unexported interface 'execer' used as return value in exported function 'ExecAdd'$"
+	return &AddTask{a, b}
+}
+
+func CallAdd(a, b int) Caller {
+	return CallFunc(ExecAdd(a, b).Exec)
+}
+
+func NewAddTask(a, b int) *AddTask {
+	return &AddTask{a, b}
+}
+
+func Exec(e execer) (any, error) { // want "^unexported interface 'execer' used as parameter in exported function 'Exec'$"
+	return e.Exec()
+}
+
+func ExecPtr(e *execer) (any, error) { // want "^unexported interface '\\*execer' used as parameter in exported function 'ExecPtr'$"
+	return (*e).Exec()
+}
+
+func exe(c execer) (any, error) {
+	return Exec(c)
+}
+
+func DumpExec(w io.Writer, c execer) { // want "^unexported interface 'execer' used as parameter in exported function 'DumpExec'$"
+	out, err := Exec(c)
+	if err != nil {
+		fmt.Fprintf(w, "err: %v\n", err)
+		return
+	}
+	fmt.Fprintf(w, "out: %v\n", out)
+}
+
+func Call(c Caller) (any, error) {
+	return c.Call()
+}
+
+func ExecAll(execs []execer) (any, error) { // want "^unexported interface '\\[\\]execer' used as parameter in exported function 'ExecAll'$"
+	var out []any
+	for _, e := range execs {
+		res, err := e.Exec()
+		if err != nil {
+			return nil, err
+		}
+		out = append(out, res)
+	}
+	return out, nil
+}
+
+func CallAll(calls []Caller) (any, error) {
+	var out []any
+	for _, c := range calls {
+		res, err := c.Call()
+		if err != nil {
+			return nil, err
+		}
+		out = append(out, res)
+	}
+	return out, nil
+}
+
+func Execs(a ...execer) (any, error) { // want "^unexported interface '...execer' used as parameter in exported function 'Execs'$"
+	return ExecAll(a)
+}
+
+func Calls(a ...Caller) (any, error) {
+	return CallAll(a)
+}
+
+func ExecChan(ch <-chan execer) chan<- any { // want "^unexported interface '<-chan execer' used as parameter in exported function 'ExecChan'$"
+	out := make(chan any)
+	go func() {
+		for v := range ch {
+			res, err := v.Exec()
+			if err != nil {
+				continue
+			}
+
+			out <- res
+		}
+	}()
+	return out
+}
+
+func LogError(msg string, err error) {
+	fmt.Fprintf(os.Stderr, "ERROR: %s err: %v\n", msg, err)
+}
+
+func LogInfo(format string, a ...any) {
+	msg := fmt.Sprintf(format, a...)
+	fmt.Fprintf(os.Stderr, "INFO: %s\n", msg)
+}
diff --git a/unexported/testdata/src/ignoredirective/ignoredirective.go b/unexported/testdata/src/ignoredirective/ignoredirective.go
new file mode 100644
index 0000000..085b7dc
--- /dev/null
+++ b/unexported/testdata/src/ignoredirective/ignoredirective.go
@@ -0,0 +1,10 @@
+package ignoredirective
+
+type execer interface {
+	Exec() (any, error)
+}
+
+//iface:ignore=unexported
+func Exec(e execer) (any, error) {
+	return e.Exec()
+}
diff --git a/unexported/testdata/src/method/method.go b/unexported/testdata/src/method/method.go
new file mode 100644
index 0000000..b0b2d5f
--- /dev/null
+++ b/unexported/testdata/src/method/method.go
@@ -0,0 +1,27 @@
+package method
+
+type User struct {
+	ID         string
+	Name       string
+	Role       string
+	Terminated bool
+}
+
+type matcher interface {
+	Match(*User) bool
+}
+
+type UserRepository struct {
+	users []*User
+}
+
+func (ur *UserRepository) Query(m matcher) ([]*User, error) { // want "^unexported interface 'matcher' used as parameter in exported method 'UserRepository.Query'$"
+	var res []*User
+	for _, u := range ur.users {
+		if !m.Match(u) {
+			continue
+		}
+		res = append(res, u)
+	}
+	return res, nil
+}
diff --git a/unexported/testdata/src/typeparams/typeparams.go b/unexported/testdata/src/typeparams/typeparams.go
new file mode 100644
index 0000000..492864f
--- /dev/null
+++ b/unexported/testdata/src/typeparams/typeparams.go
@@ -0,0 +1,38 @@
+package typeparams
+
+import (
+	"fmt"
+)
+
+type execer[T any] interface {
+	Exec() (T, error)
+}
+
+func Exec[T any](name string, reg map[string]execer[T]) (T, error) { // want "^unexported interface 'map\\[string\\]execer\\[T\\]' used as parameter in exported function 'Exec'$"
+	exe, ok := reg[name]
+	if !ok {
+		var zero T
+		return zero, fmt.Errorf("no %q on reg", name)
+	}
+
+	return exe.Exec()
+}
+
+type matcher[T any] interface {
+	Match(T) bool
+}
+
+type Repository[T any] struct {
+	entries []T
+}
+
+func (r *Repository[T]) Query(m matcher[T]) ([]T, error) { // want "^unexported interface 'matcher\\[T\\]' used as parameter in exported method 'Repository\\[T\\].Query'$"
+	var res []T
+	for _, e := range r.entries {
+		if ok := m.Match(e); !ok {
+			continue
+		}
+		res = append(res, e)
+	}
+	return res, nil
+}
diff --git a/unexported/unexported.go b/unexported/unexported.go
index d9496b9..5e0c5c7 100644
--- a/unexported/unexported.go
+++ b/unexported/unexported.go
@@ -108,6 +108,7 @@ func findIdent(expr ast.Expr) ast.Expr {
 		case *ast.Ident, *ast.SelectorExpr:
 			return e
 		default:
+			// should not happen
 			return nil
 		}
 	}
diff --git a/unexported/unexported_test.go b/unexported/unexported_test.go
index d583c2d..72e3acd 100644
--- a/unexported/unexported_test.go
+++ b/unexported/unexported_test.go
@@ -9,6 +9,9 @@ import (
 
 func Test(t *testing.T) {
 	testdata := analysistest.TestData()
-	analysistest.Run(t, testdata, unexported.Analyzer, "a")
-	analysistest.Run(t, testdata, unexported.Analyzer, "b")
+	analysistest.Run(t, testdata, unexported.Analyzer,
+		"fun",
+		"method",
+		"ignoredirective",
+		"typeparams")
 }