diff --git a/tests/testthat/_snaps/register.md b/tests/testthat/_snaps/register.md
index 75125c45..37afbf49 100644
--- a/tests/testthat/_snaps/register.md
+++ b/tests/testthat/_snaps/register.md
@@ -1,3 +1,109 @@
+# get_call_entries: returns an empty string for packages with .Call entries and NAMESPACE files
+
+    Code
+      call_entries
+    Output
+      [1] "/* .Call calls */"                             
+      [2] "extern SEXP bar(void);"                        
+      [3] ""                                              
+      [4] "static const R_CallMethodDef CallEntries[] = {"
+      [5] "    {\"bar\", (DL_FUNC) &bar, 0},"             
+      [6] "    {NULL, NULL, 0}"                           
+      [7] "};"                                            
+
+# get_call_entries: works with multiple register functions.
+
+    Code
+      cat(read_file(cpp_bindings))
+    Output
+      // Generated by cpp11: do not edit by hand
+      // clang-format off
+      
+      
+      #include "cpp11/declarations.hpp"
+      #include <R_ext/Visibility.h>
+      
+      // multiple.cpp
+      int foo();
+      extern "C" SEXP _testPkg_foo() {
+        BEGIN_CPP11
+          return cpp11::as_sexp(foo());
+        END_CPP11
+      }
+      // multiple.cpp
+      double bar(bool run);
+      extern "C" SEXP _testPkg_bar(SEXP run) {
+        BEGIN_CPP11
+          return cpp11::as_sexp(bar(cpp11::as_cpp<cpp11::decay_t<bool>>(run)));
+        END_CPP11
+      }
+      // multiple.cpp
+      bool baz(bool run, int value);
+      extern "C" SEXP _testPkg_baz(SEXP run, SEXP value) {
+        BEGIN_CPP11
+          return cpp11::as_sexp(baz(cpp11::as_cpp<cpp11::decay_t<bool>>(run), cpp11::as_cpp<cpp11::decay_t<int>>(value)));
+        END_CPP11
+      }
+      
+      extern "C" {
+      static const R_CallMethodDef CallEntries[] = {
+          {"_testPkg_bar", (DL_FUNC) &_testPkg_bar, 1},
+          {"_testPkg_baz", (DL_FUNC) &_testPkg_baz, 2},
+          {"_testPkg_foo", (DL_FUNC) &_testPkg_foo, 0},
+          {NULL, NULL, 0}
+      };
+      }
+      
+      extern "C" attribute_visible void R_init_testPkg(DllInfo* dll){
+        R_registerRoutines(dll, NULL, CallEntries, NULL, NULL);
+        R_useDynamicSymbols(dll, FALSE);
+        R_forceSymbols(dll, TRUE);
+      }
+
+# cpp_register: works with a package that registers a single c++ function
+
+    Code
+      cat(read_file(r_bindings))
+    Output
+      # Generated by cpp11: do not edit by hand
+      
+      foo <- function() {
+        .Call(`_testPkg_foo`)
+      }
+
+---
+
+    Code
+      cat(read_file(cpp_bindings))
+    Output
+      // Generated by cpp11: do not edit by hand
+      // clang-format off
+      
+      
+      #include "cpp11/declarations.hpp"
+      #include <R_ext/Visibility.h>
+      
+      // single.cpp
+      int foo();
+      extern "C" SEXP _testPkg_foo() {
+        BEGIN_CPP11
+          return cpp11::as_sexp(foo());
+        END_CPP11
+      }
+      
+      extern "C" {
+      static const R_CallMethodDef CallEntries[] = {
+          {"_testPkg_foo", (DL_FUNC) &_testPkg_foo, 0},
+          {NULL, NULL, 0}
+      };
+      }
+      
+      extern "C" attribute_visible void R_init_testPkg(DllInfo* dll){
+        R_registerRoutines(dll, NULL, CallEntries, NULL, NULL);
+        R_useDynamicSymbols(dll, FALSE);
+        R_forceSymbols(dll, TRUE);
+      }
+
 # cpp_register: can be run with messages
 
     Code
diff --git a/tests/testthat/test-register.R b/tests/testthat/test-register.R
index 130abcbe..99c8ff5d 100644
--- a/tests/testthat/test-register.R
+++ b/tests/testthat/test-register.R
@@ -50,25 +50,18 @@ describe("get_call_entries", {
   })
 
   it("returns an empty string for packages with .Call entries and NAMESPACE files", {
-
     # tools::package_native_routine_registration_skeleton is not available before R 3.4
-    skip_if(getRversion() < "3.4")
+    # R added `(void)` to the signature after R 4.3.0
+    skip_if(getRversion() < "4.3.0")
 
     pkg <- local_package()
     path <- pkg_path(pkg)
     dir.create(file.path(path, "R"))
+
     writeLines('foo <- function() .Call("bar")', file.path(path, "R", "foo.R"))
     call_entries <- get_call_entries(path, get_funs(path)$name, get_package_name(path))
-    # R added `(void)` to the signature after R 4.2.1
-    expect_match(call_entries[2], "extern SEXP bar[(](void)?[)]")
-    expect_equal(
-      call_entries[4:7],
-      c("static const R_CallMethodDef CallEntries[] = {",
-        "    {\"bar\", (DL_FUNC) &bar, 0},",
-        "    {NULL, NULL, 0}",
-        "};"
-      )
-    )
+
+    expect_snapshot(call_entries)
   })
   it("works with multiple register functions.", {
     pkg <- local_package()
@@ -78,51 +71,7 @@ describe("get_call_entries", {
 
     cpp_register(p)
     cpp_bindings <- file.path(p, "src", "cpp11.cpp")
-    expect_equal(read_file(cpp_bindings),
-                 "// Generated by cpp11: do not edit by hand
-// clang-format off
-
-
-#include \"cpp11/declarations.hpp\"
-#include <R_ext/Visibility.h>
-
-// multiple.cpp
-int foo();
-extern \"C\" SEXP _testPkg_foo() {
-  BEGIN_CPP11
-    return cpp11::as_sexp(foo());
-  END_CPP11
-}
-// multiple.cpp
-double bar(bool run);
-extern \"C\" SEXP _testPkg_bar(SEXP run) {
-  BEGIN_CPP11
-    return cpp11::as_sexp(bar(cpp11::as_cpp<cpp11::decay_t<bool>>(run)));
-  END_CPP11
-}
-// multiple.cpp
-bool baz(bool run, int value);
-extern \"C\" SEXP _testPkg_baz(SEXP run, SEXP value) {
-  BEGIN_CPP11
-    return cpp11::as_sexp(baz(cpp11::as_cpp<cpp11::decay_t<bool>>(run), cpp11::as_cpp<cpp11::decay_t<int>>(value)));
-  END_CPP11
-}
-
-extern \"C\" {
-static const R_CallMethodDef CallEntries[] = {
-    {\"_testPkg_bar\", (DL_FUNC) &_testPkg_bar, 1},
-    {\"_testPkg_baz\", (DL_FUNC) &_testPkg_baz, 2},
-    {\"_testPkg_foo\", (DL_FUNC) &_testPkg_foo, 0},
-    {NULL, NULL, 0}
-};
-}
-
-extern \"C\" attribute_visible void R_init_testPkg(DllInfo* dll){
-  R_registerRoutines(dll, NULL, CallEntries, NULL, NULL);
-  R_useDynamicSymbols(dll, FALSE);
-  R_forceSymbols(dll, TRUE);
-}
-")
+    expect_snapshot(cat(read_file(cpp_bindings)))
   })
 })
 
@@ -569,44 +518,11 @@ describe("cpp_register", {
 
     r_bindings <- file.path(p, "R", "cpp11.R")
     expect_true(file.exists(r_bindings))
-    expect_equal(read_file(r_bindings),
-"# Generated by cpp11: do not edit by hand
+    expect_snapshot(cat(read_file(r_bindings)))
 
-foo <- function() {
-  .Call(`_testPkg_foo`)
-}
-")
     cpp_bindings <- file.path(p, "src", "cpp11.cpp")
     expect_true(file.exists(cpp_bindings))
-    expect_equal(read_file(cpp_bindings),
-"// Generated by cpp11: do not edit by hand
-// clang-format off
-
-
-#include \"cpp11/declarations.hpp\"
-#include <R_ext/Visibility.h>
-
-// single.cpp
-int foo();
-extern \"C\" SEXP _testPkg_foo() {
-  BEGIN_CPP11
-    return cpp11::as_sexp(foo());
-  END_CPP11
-}
-
-extern \"C\" {
-static const R_CallMethodDef CallEntries[] = {
-    {\"_testPkg_foo\", (DL_FUNC) &_testPkg_foo, 0},
-    {NULL, NULL, 0}
-};
-}
-
-extern \"C\" attribute_visible void R_init_testPkg(DllInfo* dll){
-  R_registerRoutines(dll, NULL, CallEntries, NULL, NULL);
-  R_useDynamicSymbols(dll, FALSE);
-  R_forceSymbols(dll, TRUE);
-}
-")
+    expect_snapshot(cat(read_file(cpp_bindings)))
   })
 
   it("can be run without messages", {
@@ -617,7 +533,6 @@ extern \"C\" attribute_visible void R_init_testPkg(DllInfo* dll){
     expect_silent(cpp_register(p, quiet = TRUE))
   })
 
-
   it("can be run with messages", {
     local_reproducible_output()
     pkg <- local_package()