diff --git a/runtime/syntax/testdir/dumps/c_character_constant_00.vim b/runtime/syntax/testdir/dumps/c_character_constant_00.vim
new file mode 100644
index 0000000000..44191f8816
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/c_character_constant_00.vim
@@ -0,0 +1,2 @@
+" Replace known non-Latin-1 characters.
+%s+[🍌猫�]+?+ge
diff --git a/runtime/syntax/testdir/dumps/c_character_constant_01.vim b/runtime/syntax/testdir/dumps/c_character_constant_01.vim
new file mode 100644
index 0000000000..44191f8816
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/c_character_constant_01.vim
@@ -0,0 +1,2 @@
+" Replace known non-Latin-1 characters.
+%s+[🍌猫�]+?+ge
diff --git a/runtime/syntax/testdir/dumps/c_character_constant_02.vim b/runtime/syntax/testdir/dumps/c_character_constant_02.vim
new file mode 100644
index 0000000000..44191f8816
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/c_character_constant_02.vim
@@ -0,0 +1,2 @@
+" Replace known non-Latin-1 characters.
+%s+[🍌猫�]+?+ge
diff --git a/runtime/syntax/testdir/dumps/c_string_literal_00.vim b/runtime/syntax/testdir/dumps/c_string_literal_00.vim
new file mode 100644
index 0000000000..44191f8816
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/c_string_literal_00.vim
@@ -0,0 +1,2 @@
+" Replace known non-Latin-1 characters.
+%s+[🍌猫�]+?+ge
diff --git a/runtime/syntax/testdir/dumps/c_string_literal_01.vim b/runtime/syntax/testdir/dumps/c_string_literal_01.vim
new file mode 100644
index 0000000000..44191f8816
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/c_string_literal_01.vim
@@ -0,0 +1,2 @@
+" Replace known non-Latin-1 characters.
+%s+[🍌猫�]+?+ge
diff --git a/runtime/syntax/testdir/dumps/c_string_literal_02.vim b/runtime/syntax/testdir/dumps/c_string_literal_02.vim
new file mode 100644
index 0000000000..44191f8816
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/c_string_literal_02.vim
@@ -0,0 +1,2 @@
+" Replace known non-Latin-1 characters.
+%s+[🍌猫�]+?+ge
diff --git a/runtime/syntax/testdir/dumps/c_string_literal_03.vim b/runtime/syntax/testdir/dumps/c_string_literal_03.vim
new file mode 100644
index 0000000000..44191f8816
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/c_string_literal_03.vim
@@ -0,0 +1,2 @@
+" Replace known non-Latin-1 characters.
+%s+[🍌猫�]+?+ge
diff --git a/runtime/syntax/testdir/dumps/vim9_keymap_01.vim b/runtime/syntax/testdir/dumps/vim9_ex_loadkeymap_01.vim
similarity index 100%
rename from runtime/syntax/testdir/dumps/vim9_keymap_01.vim
rename to runtime/syntax/testdir/dumps/vim9_ex_loadkeymap_01.vim
diff --git a/runtime/syntax/testdir/dumps/vim_keymap_04.vim b/runtime/syntax/testdir/dumps/vim_ex_loadkeymap_01.vim
similarity index 100%
rename from runtime/syntax/testdir/dumps/vim_keymap_04.vim
rename to runtime/syntax/testdir/dumps/vim_ex_loadkeymap_01.vim