diff --git a/text/case_test.ts b/text/case_test.ts
deleted file mode 100644
index 1f7e0ffb8..000000000
--- a/text/case_test.ts
+++ /dev/null
@@ -1,157 +0,0 @@
-// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
-
-import { assertEquals } from "@std/assert";
-import {
-  toCamelCase,
-  toConstantCase,
-  toKebabCase,
-  toPascalCase,
-  toSnakeCase,
-} from "./mod.ts";
-
-Deno.test("toCamelCase() handles an empty string", () => {
-  assertEquals(toCamelCase(""), "");
-});
-
-Deno.test("toCamelCase() converts a single word", () => {
-  const input = "shruberry";
-  const expected = "shruberry";
-  assertEquals(toCamelCase(input), expected);
-});
-
-Deno.test("toCamelCase() converts a sentence", () => {
-  const input = "she turned me into a newt";
-  const expected = "sheTurnedMeIntoANewt";
-  assertEquals(toCamelCase(input), expected);
-});
-
-Deno.test("toCamelCase() converts multiple delimiters", () => {
-  const result = toCamelCase("I am up-to-date!");
-  const expected = "iAmUpToDate";
-  assertEquals(result, expected);
-});
-
-Deno.test("toCamelCase() trims whitespace", () => {
-  const result = toCamelCase(" deno Is AWESOME ");
-  const expected = "denoIsAwesome";
-  assertEquals(result, expected);
-});
-
-Deno.test("toKebabCase() handles an empty string", () => {
-  assertEquals(toKebabCase(""), "");
-});
-
-Deno.test("toKebabCase() converts a single word", () => {
-  const input = "shruberry";
-  const expected = "shruberry";
-  assertEquals(toKebabCase(input), expected);
-});
-
-Deno.test("toKebabCase() converts a sentence", () => {
-  const input = "she turned me into a newt";
-  const expected = "she-turned-me-into-a-newt";
-  assertEquals(toKebabCase(input), expected);
-});
-
-Deno.test("toKebabCase() converts multiple delimiters", () => {
-  const result = toKebabCase("I am up-to-date!");
-  const expected = "i-am-up-to-date";
-  assertEquals(result, expected);
-});
-
-Deno.test("toKebabCase() trims whitespace", () => {
-  const result = toKebabCase(" deno Is AWESOME ");
-  const expected = "deno-is-awesome";
-  assertEquals(result, expected);
-});
-
-Deno.test("toPascalCase() handles empty string", () => {
-  assertEquals(toPascalCase(""), "");
-});
-
-Deno.test("toPascalCase() converts a single word", () => {
-  const input = "shruberry";
-  const expected = "Shruberry";
-  assertEquals(toPascalCase(input), expected);
-});
-
-Deno.test("toPascalCase() converts a sentence", () => {
-  const input = "she turned me into a newt";
-  const expected = "SheTurnedMeIntoANewt";
-  assertEquals(toPascalCase(input), expected);
-});
-
-Deno.test("toPascalCase() converts multiple delimiters", () => {
-  const result = toPascalCase("I am up-to-date!");
-  const expected = "IAmUpToDate";
-  assertEquals(result, expected);
-});
-
-Deno.test("toPascalCase() trims whitespace", () => {
-  const result = toPascalCase(" deno Is AWESOME ");
-  const expected = "DenoIsAwesome";
-  assertEquals(result, expected);
-});
-
-Deno.test("toPascalCase() converts a single word with Cyrillic letters", () => {
-  const input = "шруберри";
-  const expected = "Шруберри";
-  assertEquals(toPascalCase(input), expected);
-});
-
-Deno.test("toSnakeCase() handles an empty string", () => {
-  assertEquals(toSnakeCase(""), "");
-});
-
-Deno.test("toSnakeCase() converts a single word", () => {
-  const input = "shruberry";
-  const expected = "shruberry";
-  assertEquals(toSnakeCase(input), expected);
-});
-
-Deno.test("toSnakeCase() converts a sentence", () => {
-  const input = "she turned me into a newt";
-  const expected = "she_turned_me_into_a_newt";
-  assertEquals(toSnakeCase(input), expected);
-});
-
-Deno.test("toSnakeCase() converts multiple delimiters", () => {
-  const result = toSnakeCase("I am up-to-date!");
-  const expected = "i_am_up_to_date";
-  assertEquals(result, expected);
-});
-
-Deno.test("toSnakeCase() trims whitespace", () => {
-  const result = toSnakeCase(" deno Is AWESOME ");
-  const expected = "deno_is_awesome";
-  assertEquals(result, expected);
-});
-
-Deno.test("toSnakeCase() splits words before and after the numbers", () => {
-  assertEquals(toSnakeCase("str2Num"), "str_2_num");
-  assertEquals(toSnakeCase("Str2Num"), "str_2_num");
-});
-
-Deno.test("toConstantCase() converts a single word", () => {
-  const input = "shruberry";
-  const expected = "SHRUBERRY";
-  assertEquals(toConstantCase(input), expected);
-});
-
-Deno.test("toConstantCase() converts a sentence", () => {
-  const input = "she turned me into a newt";
-  const expected = "SHE_TURNED_ME_INTO_A_NEWT";
-  assertEquals(toConstantCase(input), expected);
-});
-
-Deno.test("toConstantCase() converts multiple delimiters", () => {
-  const result = toConstantCase("I am up-to-date!");
-  const expected = "I_AM_UP_TO_DATE";
-  assertEquals(result, expected);
-});
-
-Deno.test("toConstantCase() trims whitespace", () => {
-  const result = toConstantCase(" deno Is AWESOME ");
-  const expected = "DENO_IS_AWESOME";
-  assertEquals(result, expected);
-});
diff --git a/text/to_camel_case_test.ts b/text/to_camel_case_test.ts
new file mode 100644
index 000000000..4825de822
--- /dev/null
+++ b/text/to_camel_case_test.ts
@@ -0,0 +1,32 @@
+// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
+
+import { assertEquals } from "@std/assert";
+import { toCamelCase } from "./mod.ts";
+
+Deno.test("toCamelCase() handles an empty string", () => {
+  assertEquals(toCamelCase(""), "");
+});
+
+Deno.test("toCamelCase() converts a single word", () => {
+  const input = "shruberry";
+  const expected = "shruberry";
+  assertEquals(toCamelCase(input), expected);
+});
+
+Deno.test("toCamelCase() converts a sentence", () => {
+  const input = "she turned me into a newt";
+  const expected = "sheTurnedMeIntoANewt";
+  assertEquals(toCamelCase(input), expected);
+});
+
+Deno.test("toCamelCase() converts multiple delimiters", () => {
+  const result = toCamelCase("I am up-to-date!");
+  const expected = "iAmUpToDate";
+  assertEquals(result, expected);
+});
+
+Deno.test("toCamelCase() trims whitespace", () => {
+  const result = toCamelCase(" deno Is AWESOME ");
+  const expected = "denoIsAwesome";
+  assertEquals(result, expected);
+});
diff --git a/text/to_constant_case_test.ts b/text/to_constant_case_test.ts
new file mode 100644
index 000000000..069b3c3c8
--- /dev/null
+++ b/text/to_constant_case_test.ts
@@ -0,0 +1,28 @@
+// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
+
+import { assertEquals } from "@std/assert";
+import { toConstantCase } from "./mod.ts";
+
+Deno.test("toConstantCase() converts a single word", () => {
+  const input = "shruberry";
+  const expected = "SHRUBERRY";
+  assertEquals(toConstantCase(input), expected);
+});
+
+Deno.test("toConstantCase() converts a sentence", () => {
+  const input = "she turned me into a newt";
+  const expected = "SHE_TURNED_ME_INTO_A_NEWT";
+  assertEquals(toConstantCase(input), expected);
+});
+
+Deno.test("toConstantCase() converts multiple delimiters", () => {
+  const result = toConstantCase("I am up-to-date!");
+  const expected = "I_AM_UP_TO_DATE";
+  assertEquals(result, expected);
+});
+
+Deno.test("toConstantCase() trims whitespace", () => {
+  const result = toConstantCase(" deno Is AWESOME ");
+  const expected = "DENO_IS_AWESOME";
+  assertEquals(result, expected);
+});
diff --git a/text/to_kebab_case_test.ts b/text/to_kebab_case_test.ts
new file mode 100644
index 000000000..7a7472258
--- /dev/null
+++ b/text/to_kebab_case_test.ts
@@ -0,0 +1,32 @@
+// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
+
+import { assertEquals } from "@std/assert";
+import { toKebabCase } from "./mod.ts";
+
+Deno.test("toKebabCase() handles an empty string", () => {
+  assertEquals(toKebabCase(""), "");
+});
+
+Deno.test("toKebabCase() converts a single word", () => {
+  const input = "shruberry";
+  const expected = "shruberry";
+  assertEquals(toKebabCase(input), expected);
+});
+
+Deno.test("toKebabCase() converts a sentence", () => {
+  const input = "she turned me into a newt";
+  const expected = "she-turned-me-into-a-newt";
+  assertEquals(toKebabCase(input), expected);
+});
+
+Deno.test("toKebabCase() converts multiple delimiters", () => {
+  const result = toKebabCase("I am up-to-date!");
+  const expected = "i-am-up-to-date";
+  assertEquals(result, expected);
+});
+
+Deno.test("toKebabCase() trims whitespace", () => {
+  const result = toKebabCase(" deno Is AWESOME ");
+  const expected = "deno-is-awesome";
+  assertEquals(result, expected);
+});
diff --git a/text/to_pascal_case_test.ts b/text/to_pascal_case_test.ts
new file mode 100644
index 000000000..114078251
--- /dev/null
+++ b/text/to_pascal_case_test.ts
@@ -0,0 +1,38 @@
+// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
+
+import { assertEquals } from "@std/assert";
+import { toPascalCase } from "./mod.ts";
+
+Deno.test("toPascalCase() handles empty string", () => {
+  assertEquals(toPascalCase(""), "");
+});
+
+Deno.test("toPascalCase() converts a single word", () => {
+  const input = "shruberry";
+  const expected = "Shruberry";
+  assertEquals(toPascalCase(input), expected);
+});
+
+Deno.test("toPascalCase() converts a sentence", () => {
+  const input = "she turned me into a newt";
+  const expected = "SheTurnedMeIntoANewt";
+  assertEquals(toPascalCase(input), expected);
+});
+
+Deno.test("toPascalCase() converts multiple delimiters", () => {
+  const result = toPascalCase("I am up-to-date!");
+  const expected = "IAmUpToDate";
+  assertEquals(result, expected);
+});
+
+Deno.test("toPascalCase() trims whitespace", () => {
+  const result = toPascalCase(" deno Is AWESOME ");
+  const expected = "DenoIsAwesome";
+  assertEquals(result, expected);
+});
+
+Deno.test("toPascalCase() converts a single word with Cyrillic letters", () => {
+  const input = "шруберри";
+  const expected = "Шруберри";
+  assertEquals(toPascalCase(input), expected);
+});
diff --git a/text/to_snake_case_test.ts b/text/to_snake_case_test.ts
new file mode 100644
index 000000000..e0b8af28d
--- /dev/null
+++ b/text/to_snake_case_test.ts
@@ -0,0 +1,37 @@
+// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
+
+import { assertEquals } from "@std/assert";
+import { toSnakeCase } from "./mod.ts";
+
+Deno.test("toSnakeCase() handles an empty string", () => {
+  assertEquals(toSnakeCase(""), "");
+});
+
+Deno.test("toSnakeCase() converts a single word", () => {
+  const input = "shruberry";
+  const expected = "shruberry";
+  assertEquals(toSnakeCase(input), expected);
+});
+
+Deno.test("toSnakeCase() converts a sentence", () => {
+  const input = "she turned me into a newt";
+  const expected = "she_turned_me_into_a_newt";
+  assertEquals(toSnakeCase(input), expected);
+});
+
+Deno.test("toSnakeCase() converts multiple delimiters", () => {
+  const result = toSnakeCase("I am up-to-date!");
+  const expected = "i_am_up_to_date";
+  assertEquals(result, expected);
+});
+
+Deno.test("toSnakeCase() trims whitespace", () => {
+  const result = toSnakeCase(" deno Is AWESOME ");
+  const expected = "deno_is_awesome";
+  assertEquals(result, expected);
+});
+
+Deno.test("toSnakeCase() splits words before and after the numbers", () => {
+  assertEquals(toSnakeCase("str2Num"), "str_2_num");
+  assertEquals(toSnakeCase("Str2Num"), "str_2_num");
+});