diff --git a/packages/cli/src/lib/hashing-utils.js b/packages/cli/src/lib/hashing-utils.js
index c050d1c67..9e24ee00b 100644
--- a/packages/cli/src/lib/hashing-utils.js
+++ b/packages/cli/src/lib/hashing-utils.js
@@ -1,12 +1,15 @@
-// https://gist.github.com/hyamamoto/fd435505d29ebfa3d9716fd2be8d42f0#gistcomment-2775538
-function hashString(inputString) {
-  let h = 0;
+import { createHash } from "node:crypto";
 
-  for (let i = 0; i < inputString.length; i += 1) {
-    h = (Math.imul(31, h) + inputString.charCodeAt(i)) | 0;
-  }
-
-  return Math.abs(h).toString();
+/**
+ * Generates a hash of the input string.
+ * @param {string} inputString - The string to hash.
+ * @param {number} [bytes=6] - Number of bytes to be generated by the hash (default: 6).
+ * Note: This specifies the number of bytes, not the length of the hash.
+ * The hash length in characters depends on the bytes and is approximately `(bytes * 8 / 6)` when encoded in base64url.
+ * @returns {string} A base64url-encoded hash of the input string.
+ */
+function hashString(inputString, bytes = 6) {
+  return createHash("shake256", { outputLength: bytes }).update(inputString).digest("base64url");
 }
 
 export { hashString };
diff --git a/packages/cli/test/cases/build.config.optimization-default/build.config-optimization-default.spec.js b/packages/cli/test/cases/build.config.optimization-default/build.config-optimization-default.spec.js
index d29e28248..63d99cb17 100644
--- a/packages/cli/test/cases/build.config.optimization-default/build.config-optimization-default.spec.js
+++ b/packages/cli/test/cases/build.config.optimization-default/build.config-optimization-default.spec.js
@@ -31,7 +31,11 @@ import fs from "node:fs";
 import glob from "glob-promise";
 import { JSDOM } from "jsdom";
 import path from "node:path";
-import { getDependencyFiles, getOutputTeardownFiles } from "../../../../../test/utils.js";
+import {
+  getDependencyFiles,
+  getOutputTeardownFiles,
+  HASH_REGEX,
+} from "../../../../../test/utils.js";
 import { Runner } from "gallinago";
 import { fileURLToPath } from "node:url";
 
@@ -132,7 +136,19 @@ describe("Build Greenwood With: ", function () {
           const customCss = await fs.promises.readFile(cssFiles[0], "utf-8");
 
           expect(cssFiles.length).to.be.equal(1);
-          expect(customCss).to.be.equal(expectedCss);
+          const regex = HASH_REGEX.replace("{8}", "{8,10}");
+          const normalizeCss = (css) =>
+            css
+              .replace(
+                new RegExp(`webcomponents\\.${regex}\\.jpg`, "g"),
+                "webcomponents.[HASH].jpg",
+              )
+              .replace(new RegExp(`bar\\.${regex}\\.baz`, "g"), "bar.[HASH].baz");
+
+          const normalizedCustomCss = normalizeCss(customCss);
+          const normalizedExpectedCss = normalizeCss(expectedCss);
+
+          expect(normalizedCustomCss).to.be.equal(normalizedExpectedCss);
         });
       });
 
@@ -172,14 +188,14 @@ describe("Build Greenwood With: ", function () {
           it("should have the expected @font-face file bundle path in the referenced <style> tag in index.html", async function () {
             const styleTag = Array.from(dom.window.document.querySelectorAll("head style"));
 
-            expect(styleTag[0].textContent).to.contain(
-              `src:url('/${fontPath}/Geist-Regular.965782360.woff2')`,
+            expect(styleTag[0].textContent.replace(/\s+/g, "")).to.match(
+              new RegExp(`src:url\\('/${fontPath}/Geist-Regular\\.${HASH_REGEX}\\.woff2'\\)`),
             );
           });
         });
 
         describe("user workspace reference", () => {
-          const imagePath = "images/webcomponents.1079385342.jpg";
+          const imagePath = `images/webcomponents.*.jpg`;
 
           it("should have the expected background image from the user's workspace the output directory", async function () {
             expect(
@@ -193,14 +209,16 @@ describe("Build Greenwood With: ", function () {
             );
             const contents = await fs.promises.readFile(mainCss[0], "utf-8");
 
-            expect(contents).to.contain(
-              `body{background-color:green;background-image:url('/${imagePath}');}`,
+            expect(contents.replace(/\s+/g, "")).to.match(
+              new RegExp(
+                `body\\{background-color:green;background-image:url\\('/images/webcomponents\\.${HASH_REGEX}\\.jpg'\\);\\}`,
+              ),
             );
           });
         });
 
         describe("inline scratch dir workspace reference", () => {
-          const imagePath = "images/link.1200825667.png";
+          const imagePath = `images/link.*.png`;
 
           it("should have the expected background image from the user's workspace the output directory", async function () {
             expect(
@@ -210,15 +228,16 @@ describe("Build Greenwood With: ", function () {
 
           it("should have the expected background-image url file bundle path in the referenced <style> tag in index.html", async function () {
             const styleTag = Array.from(dom.window.document.querySelectorAll("head style"));
-
-            expect(styleTag[0].textContent).to.contain(
-              `html{background-image:url('/${imagePath}')}`,
+            expect(styleTag[0].textContent).to.match(
+              new RegExp(
+                `html\\{background-image:url\\('/images/link\\.${HASH_REGEX}\\.png'\\)\\}`,
+              ),
             );
           });
         });
 
         describe("absolute user workspace reference", () => {
-          const resourcePath = "foo/bar.642520792.baz";
+          const resourcePath = `foo/bar.*.baz`;
 
           it("should have the expected resource reference from the user's workspace in the output directory", async function () {
             expect(
diff --git a/packages/cli/test/cases/build.default.import-node-modules/build.default.import-node-modules.spec.js b/packages/cli/test/cases/build.default.import-node-modules/build.default.import-node-modules.spec.js
index c5a1cc95e..f7dd58c34 100644
--- a/packages/cli/test/cases/build.default.import-node-modules/build.default.import-node-modules.spec.js
+++ b/packages/cli/test/cases/build.default.import-node-modules/build.default.import-node-modules.spec.js
@@ -26,7 +26,11 @@ import fs from "node:fs";
 import glob from "glob-promise";
 import { JSDOM } from "jsdom";
 import path from "node:path";
-import { getOutputTeardownFiles, getDependencyFiles } from "../../../../../test/utils.js";
+import {
+  getOutputTeardownFiles,
+  getDependencyFiles,
+  HASH_REGEX,
+} from "../../../../../test/utils.js";
 import { Runner } from "gallinago";
 import { fileURLToPath } from "node:url";
 
@@ -118,8 +122,10 @@ describe("Build Greenwood With: ", function () {
           dom.window.document.querySelectorAll("head > script:not([src])"),
         ).filter((tag) => !tag.getAttribute("data-gwd"))[0];
 
-        expect(inlineScriptTag.textContent.replace(/\n/g, "")).to.equal(
-          'import"/368592136.dlaVsmnb.js";import"/lit-html.CYd3Xodq.js";//# sourceMappingURL=368592136.BFJXtrkH.js.map',
+        expect(inlineScriptTag.textContent.replace(/\n/g, "")).to.match(
+          new RegExp(
+            `import"\\/${HASH_REGEX}\\.${HASH_REGEX}\\.js";import"\\/lit-html\\.${HASH_REGEX}\\.js";\\/\\/# sourceMappingURL=${HASH_REGEX}\\.${HASH_REGEX}\\.js\\.map`,
+          ),
         );
       });
     });
@@ -197,12 +203,10 @@ describe("Build Greenwood With: ", function () {
           path.join(this.context.publicDir, "styles/theme.*.css"),
         );
         const contents = fs.readFileSync(themeFile[0], "utf-8");
-
-        expect(
-          contents.indexOf(
-            "@font-face {font-family:'FontAwesome';src:url('/node-modules/font-awesome/fonts/fontawesome-webfont.139345087.eot?v=4.7.0');",
-          ) > 0,
-        ).to.equal(true);
+        const contentsRegex = new RegExp(
+          `@font-face\\s*\\{font-family:'FontAwesome';src:url\\('/node-modules/font-awesome/fonts/fontawesome-webfont\\.${HASH_REGEX}\\.eot\\?v=4\\.7\\.0'\\);`,
+        );
+        expect(contents).to.match(contentsRegex);
       });
     });
   });
diff --git a/packages/cli/test/cases/build.default.workspace-frontmatter-imports/build.default.workspace-frontmatter-imports.spec.js b/packages/cli/test/cases/build.default.workspace-frontmatter-imports/build.default.workspace-frontmatter-imports.spec.js
index 0f432be65..3707eeceb 100644
--- a/packages/cli/test/cases/build.default.workspace-frontmatter-imports/build.default.workspace-frontmatter-imports.spec.js
+++ b/packages/cli/test/cases/build.default.workspace-frontmatter-imports/build.default.workspace-frontmatter-imports.spec.js
@@ -41,7 +41,7 @@ import fs from "node:fs";
 import glob from "glob-promise";
 import { JSDOM } from "jsdom";
 import path from "node:path";
-import { getOutputTeardownFiles } from "../../../../../test/utils.js";
+import { getOutputTeardownFiles, HASH_REGEX } from "../../../../../test/utils.js";
 import { runSmokeTest } from "../../../../../test/smoke-test.js";
 import { Runner } from "gallinago";
 import { fileURLToPath } from "node:url";
@@ -128,10 +128,9 @@ describe("Build Greenwood With: ", function () {
         });
 
         it("should have expected attributes on the `<link>` tag from frontmatter imports", async function () {
+          const regexExpression = new RegExp(`/components/counter/counter.${HASH_REGEX}.css`);
           const link = Array.from(dom.window.document.querySelectorAll("head link")).find(
-            (link) =>
-              link.getAttribute("href") === "/components/counter/counter.1173776585.css" &&
-              link.rel !== "preload",
+            (link) => regexExpression.test(link.getAttribute("href")) && link.rel !== "preload",
           );
 
           expect(link.getAttribute("data-gwd-opt")).to.equal(null);
@@ -219,8 +218,9 @@ describe("Build Greenwood With: ", function () {
         });
 
         it("should have expected attributes on the `<link>` tag from frontmatter imports", async function () {
-          const link = Array.from(dom.window.document.querySelectorAll("head link")).find(
-            (link) => link.getAttribute("href") === "/styles/frontmatter-custom.1672594117.css",
+          const regexExpression = new RegExp(`/styles/frontmatter-custom.${HASH_REGEX}.css`);
+          const link = Array.from(dom.window.document.querySelectorAll("head link")).find((link) =>
+            regexExpression.test(link.getAttribute("href")),
           );
 
           expect(link).to.not.be.undefined;
diff --git a/packages/cli/test/cases/build.default.workspace-javascript-css/build.default.workspace-javascript-css.spec.js b/packages/cli/test/cases/build.default.workspace-javascript-css/build.default.workspace-javascript-css.spec.js
index 9b7304ed0..a403921f5 100644
--- a/packages/cli/test/cases/build.default.workspace-javascript-css/build.default.workspace-javascript-css.spec.js
+++ b/packages/cli/test/cases/build.default.workspace-javascript-css/build.default.workspace-javascript-css.spec.js
@@ -224,13 +224,13 @@ describe("Build Greenwood With: ", function () {
 
       it("should have the expected main.css file in the output directory", async function () {
         expect(
-          await glob.promise(path.join(this.context.publicDir, "styles", "main.*[a-z0-9].css")),
+          await glob.promise(path.join(this.context.publicDir, "styles", "main.*.css")),
         ).to.have.lengthOf(1);
       });
 
       it("should have the expected other.css file in the output directory", async function () {
         expect(
-          await glob.promise(path.join(this.context.publicDir, "styles", "other.*[a-z0-9].css")),
+          await glob.promise(path.join(this.context.publicDir, "styles", "other.*.css")),
         ).to.have.lengthOf(1);
       });
 
diff --git a/packages/cli/test/cases/build.default.workspace-layouts-page/build.default.workspace-layouts-page.spec.js b/packages/cli/test/cases/build.default.workspace-layouts-page/build.default.workspace-layouts-page.spec.js
index 7f756ebdf..de04d531a 100644
--- a/packages/cli/test/cases/build.default.workspace-layouts-page/build.default.workspace-layouts-page.spec.js
+++ b/packages/cli/test/cases/build.default.workspace-layouts-page/build.default.workspace-layouts-page.spec.js
@@ -26,7 +26,7 @@ import chai from "chai";
 import { JSDOM } from "jsdom";
 import path from "node:path";
 import { runSmokeTest } from "../../../../../test/smoke-test.js";
-import { getOutputTeardownFiles } from "../../../../../test/utils.js";
+import { getOutputTeardownFiles, HASH_REGEX } from "../../../../../test/utils.js";
 import { Runner } from "gallinago";
 import { fileURLToPath } from "node:url";
 
@@ -101,7 +101,7 @@ describe("Build Greenwood With: ", function () {
 
         it("should add one page layout <link> tag", function () {
           expect(linkTags[0].rel).to.equal("stylesheet");
-          expect(linkTags[0].href).to.match(/styles\/theme.[a-z0-9]{10}.css/);
+          expect(linkTags[0].href).to.match(new RegExp(`/styles/theme.${HASH_REGEX}.css`));
         });
 
         it("should add one page layout <style> tag", function () {
diff --git a/packages/cli/test/cases/develop.default/develop.default.spec.js b/packages/cli/test/cases/develop.default/develop.default.spec.js
index f713ce4c3..16c17ad88 100644
--- a/packages/cli/test/cases/develop.default/develop.default.spec.js
+++ b/packages/cli/test/cases/develop.default/develop.default.spec.js
@@ -53,6 +53,7 @@ import path from "node:path";
 import { runSmokeTest } from "../../../../../test/smoke-test.js";
 import { Runner } from "gallinago";
 import { fileURLToPath } from "node:url";
+import { HASH_REGEX } from "../../../../../test/utils.js";
 
 const expect = chai.expect;
 
@@ -429,7 +430,7 @@ describe("Develop Greenwood With: ", function () {
       });
 
       it("should return the correct etag header", function (done) {
-        expect(response.headers.get("etag")).to.equal("2130309740");
+        expect(response.headers.get("etag")).to.match(new RegExp(HASH_REGEX));
         done();
       });
 
@@ -445,7 +446,7 @@ describe("Develop Greenwood With: ", function () {
 
       before(async function () {
         response = await fetch(`${hostname}:${port}/assets/splash-clip.mp4`, {
-          headers: new Headers({ "if-none-match": "2130309740" }),
+          headers: new Headers({ "if-none-match": "QgHxJEgC" }),
         });
         body = await response.clone().text();
       });
diff --git a/packages/cli/test/cases/loaders-build.import-attributes/loaders-build.import-attributes.spec.js b/packages/cli/test/cases/loaders-build.import-attributes/loaders-build.import-attributes.spec.js
index c7ac20d9c..f07a738b4 100644
--- a/packages/cli/test/cases/loaders-build.import-attributes/loaders-build.import-attributes.spec.js
+++ b/packages/cli/test/cases/loaders-build.import-attributes/loaders-build.import-attributes.spec.js
@@ -27,7 +27,7 @@ import fs from "node:fs";
 import glob from "glob-promise";
 import path from "node:path";
 import { Runner } from "gallinago";
-import { getOutputTeardownFiles } from "../../../../../test/utils.js";
+import { getOutputTeardownFiles, HASH_REGEX } from "../../../../../test/utils.js";
 import { fileURLToPath } from "node:url";
 
 const expect = chai.expect;
@@ -66,7 +66,7 @@ describe("Build Greenwood With: ", function () {
 
         expect(scripts.length).to.equal(1);
         expect(scriptContents).to.match(
-          /import r from"\/styles\/theme\.([a-zA-Z0-9]{8}.)\.css"with{type:"css"};/,
+          new RegExp(`import r from"/styles/theme\\.${HASH_REGEX}\\.css"with\\{type:"css"\\};`),
         );
       });
 
@@ -75,7 +75,7 @@ describe("Build Greenwood With: ", function () {
 
         expect(scripts.length).to.equal(1);
         expect(scriptContents).to.match(
-          /import a from"\/card\.([a-zA-Z0-9-]{8})\.css"with{type:"css"};/,
+          new RegExp(`import a from"/card\\.${HASH_REGEX}\\.css"with\\{type:"css"\\};`),
         );
       });
 
diff --git a/packages/cli/test/cases/loaders-build.prerender-import-attributes/loaders-build.prerender-import-attributes.spec.js b/packages/cli/test/cases/loaders-build.prerender-import-attributes/loaders-build.prerender-import-attributes.spec.js
index 77e1543eb..3f53a1ce3 100644
--- a/packages/cli/test/cases/loaders-build.prerender-import-attributes/loaders-build.prerender-import-attributes.spec.js
+++ b/packages/cli/test/cases/loaders-build.prerender-import-attributes/loaders-build.prerender-import-attributes.spec.js
@@ -29,7 +29,7 @@ import glob from "glob-promise";
 import { JSDOM } from "jsdom";
 import path from "node:path";
 import { runSmokeTest } from "../../../../../test/smoke-test.js";
-import { getOutputTeardownFiles } from "../../../../../test/utils.js";
+import { getOutputTeardownFiles, HASH_REGEX } from "../../../../../test/utils.js";
 import { Runner } from "gallinago";
 import { fileURLToPath } from "node:url";
 
@@ -70,8 +70,8 @@ describe("Build Greenwood With: ", function () {
         const scriptContents = fs.readFileSync(scripts[0], "utf-8");
 
         expect(scripts.length).to.equal(1);
-        expect(scriptContents).to.contain(
-          `import e from"/hero.${cssFileHash}.css"with{type:"css"}`,
+        expect(scriptContents).to.match(
+          new RegExp(`import e from"/hero\\.${HASH_REGEX}\\.css"with\\{type:"css"\\};`),
         );
       });
 
diff --git a/packages/cli/test/cases/serve.config.base-path/serve.config.base-path.spec.js b/packages/cli/test/cases/serve.config.base-path/serve.config.base-path.spec.js
index 47c6dc340..db7c407cf 100644
--- a/packages/cli/test/cases/serve.config.base-path/serve.config.base-path.spec.js
+++ b/packages/cli/test/cases/serve.config.base-path/serve.config.base-path.spec.js
@@ -41,7 +41,7 @@ import fs from "node:fs";
 import glob from "glob-promise";
 import { JSDOM } from "jsdom";
 import path from "node:path";
-import { getOutputTeardownFiles } from "../../../../../test/utils.js";
+import { getOutputTeardownFiles, HASH_REGEX } from "../../../../../test/utils.js";
 import { Runner } from "gallinago";
 import { fileURLToPath } from "node:url";
 
@@ -55,7 +55,6 @@ describe("Serve Greenwood With: ", function () {
   const hostname = "http://127.0.0.1:8080";
   const basePath = "/my-path";
   const jsHash = "eCbOYUm_";
-  const cssHash = "105034690";
   let runner;
 
   before(function () {
@@ -142,7 +141,9 @@ describe("Serve Greenwood With: ", function () {
         // TODO for some reason there is an extra <link> tag in the head, should only be 1
         // https://github.com/ProjectEvergreen/greenwood/issues/1051
         expect(links.length).to.equal(2);
-        expect(links[1].getAttribute("href")).to.equal(`${basePath}/card.${jsHash}.js`);
+        expect(links[1].getAttribute("href")).to.match(
+          new RegExp(`${basePath}/card.${HASH_REGEX}.js`),
+        );
 
         done();
       });
@@ -155,7 +156,9 @@ describe("Serve Greenwood With: ", function () {
         // TODO for some reason there is an extra <script> tag in the head, should only be 1
         // https://github.com/ProjectEvergreen/greenwood/issues/1051
         expect(scripts.length).to.equal(2);
-        expect(scripts[0].getAttribute("src")).to.equal(`${basePath}/card.${jsHash}.js`);
+        expect(scripts[0].getAttribute("src")).to.match(
+          new RegExp(`${basePath}/card\\.${HASH_REGEX}\\.js`),
+        );
 
         done();
       });
@@ -166,7 +169,9 @@ describe("Serve Greenwood With: ", function () {
         );
 
         expect(links.length).to.equal(1);
-        expect(links[0].getAttribute("href")).to.equal(`${basePath}/styles/main.${cssHash}.css`);
+        expect(links[0].getAttribute("href")).to.match(
+          new RegExp(`${basePath}/styles/main\\.${HASH_REGEX}\\.css`),
+        );
 
         done();
       });
@@ -177,7 +182,9 @@ describe("Serve Greenwood With: ", function () {
         );
 
         expect(styles.length).to.equal(1);
-        expect(styles[0].getAttribute("href")).to.equal(`${basePath}/styles/main.${cssHash}.css`);
+        expect(styles[0].getAttribute("href")).to.match(
+          new RegExp(`${basePath}/styles/main\\.${HASH_REGEX}\\.css`),
+        );
 
         done();
       });
@@ -213,7 +220,7 @@ describe("Serve Greenwood With: ", function () {
       let body = "";
 
       before(async function () {
-        response = await fetch(`${hostname}${basePath}/styles/main.${cssHash}.css`);
+        response = await fetch(`${hostname}${basePath}/styles/main.Bs32TLjt.css`);
         body = await response.clone().text();
       });
 
@@ -228,8 +235,10 @@ describe("Serve Greenwood With: ", function () {
       });
 
       it("should return the correct response body", function (done) {
-        expect(body).to.contain(
-          "*{color:blue;background-image:url('/my-path/images/webcomponents.1079385342.jpg');}",
+        expect(body).to.match(
+          new RegExp(
+            `\\*\\{color:blue;background-image:url\\('/my-path/images/webcomponents\\.${HASH_REGEX}\\.jpg'\\);\\}`,
+          ),
         );
         done();
       });
diff --git a/packages/plugin-css-modules/test/cases/build.default/build.default.spec.js b/packages/plugin-css-modules/test/cases/build.default/build.default.spec.js
index 0afa81ec4..452e27e75 100644
--- a/packages/plugin-css-modules/test/cases/build.default/build.default.spec.js
+++ b/packages/plugin-css-modules/test/cases/build.default/build.default.spec.js
@@ -35,7 +35,7 @@ import glob from "glob-promise";
 import path from "node:path";
 import { parse, walk } from "css-tree";
 import { runSmokeTest } from "../../../../../test/smoke-test.js";
-import { getOutputTeardownFiles } from "../../../../../test/utils.js";
+import { getOutputTeardownFiles, HASH_REGEX } from "../../../../../test/utils.js";
 import { Runner } from "gallinago";
 import { fileURLToPath } from "node:url";
 import { implementation } from "jsdom/lib/jsdom/living/nodes/HTMLStyleElement-impl.js";
@@ -129,7 +129,10 @@ describe("Build Greenwood With: ", function () {
             enter: function (node, item) {
               const { type, name } = node;
               if (type === "ClassSelector" && item.prev === null) {
-                const scopedClassNameRegex = new RegExp(String.raw`.header-\d+-${name}`, "g");
+                const scopedClassNameRegex = new RegExp(
+                  String.raw`.header-${HASH_REGEX}-${name}`,
+                  "g",
+                );
 
                 classes.push(name);
                 expect(styleText).to.match(scopedClassNameRegex);
@@ -199,11 +202,11 @@ describe("Build Greenwood With: ", function () {
       describe("Logo component nested in <app-header> component", () => {
         it("should have the expected logo CSS inlined into the style tag", () => {
           const styles = dom.window.document.querySelectorAll("head style");
-          const styleText = styles[0].textContent;
-          const expectedStyles =
-            ".logo-695811019-container{display:flex}.logo-695811019-logo{display:inline-block;width:100%;}";
-
-          expect(styleText).to.contain(expectedStyles);
+          const styleText = styles[0].textContent.replace(/\s+/g, "").replace(/;/g, "");
+          const expectedStyles = new RegExp(
+            `.logo-${HASH_REGEX}-container{display:flex}.logo-${HASH_REGEX}-logo{display:inline-blockwidth:100%`,
+          );
+          expect(styleText).to.match(expectedStyles);
         });
       });
     });
diff --git a/packages/plugin-css-modules/test/cases/develop.default/develop.default.spec.js b/packages/plugin-css-modules/test/cases/develop.default/develop.default.spec.js
index 4b36fd861..39e6d4be7 100644
--- a/packages/plugin-css-modules/test/cases/develop.default/develop.default.spec.js
+++ b/packages/plugin-css-modules/test/cases/develop.default/develop.default.spec.js
@@ -33,7 +33,7 @@ import { JSDOM } from "jsdom";
 import fs from "node:fs";
 import path from "node:path";
 import { parse, walk } from "css-tree";
-import { getOutputTeardownFiles } from "../../../../../test/utils.js";
+import { getOutputTeardownFiles, HASH_REGEX } from "../../../../../test/utils.js";
 import { Runner } from "gallinago";
 import { fileURLToPath } from "node:url";
 import { implementation } from "jsdom/lib/jsdom/living/nodes/HTMLStyleElement-impl.js";
@@ -136,7 +136,10 @@ describe("Develop Greenwood With: ", function () {
             enter: function (node, item) {
               const { type, name } = node;
               if (type === "ClassSelector" && item.prev === null) {
-                const scopedClassNameRegex = new RegExp(String.raw`.header-\d+-${name}`, "g");
+                const scopedClassNameRegex = new RegExp(
+                  String.raw`\.header-${HASH_REGEX}-${name}`,
+                  "g",
+                );
 
                 classes.push(name);
                 expect(styleText).to.match(scopedClassNameRegex);
@@ -238,13 +241,11 @@ describe("Develop Greenwood With: ", function () {
       describe("Logo component nested in <app-header> component", () => {
         it("should have the expected logo CSS inlined into the style tag", () => {
           const styles = dom.window.document.querySelectorAll("head style");
-          const styleText = styles[0].textContent;
-          const expectedStyles =
-            ".logo-695811019-container{display:flex}.logo-695811019-logo{display:inline-block;width:100%;}";
-
-          expect(styleText.replace(/ /g, "").replace(/\n/g, "").replace(/;/g, "")).to.contain(
-            expectedStyles.replace(/;/g, ""),
+          const styleText = styles[0].textContent.replace(/\s+/g, "").replace(/;/g, "");
+          const expectedStyles = new RegExp(
+            String.raw`.logo-${HASH_REGEX}-container{display:flex}.logo-${HASH_REGEX}-logo{display:inline-blockwidth:100%`,
           );
+          expect(styleText).to.match(expectedStyles);
         });
       });
     });
diff --git a/packages/plugin-css-modules/test/cases/loaders-build.prerender/loaders-build.prerender.spec.js b/packages/plugin-css-modules/test/cases/loaders-build.prerender/loaders-build.prerender.spec.js
index bc549fc7a..34c0a2938 100644
--- a/packages/plugin-css-modules/test/cases/loaders-build.prerender/loaders-build.prerender.spec.js
+++ b/packages/plugin-css-modules/test/cases/loaders-build.prerender/loaders-build.prerender.spec.js
@@ -39,7 +39,7 @@ import glob from "glob-promise";
 import path from "node:path";
 import { parse, walk } from "css-tree";
 import { runSmokeTest } from "../../../../../test/smoke-test.js";
-import { getOutputTeardownFiles } from "../../../../../test/utils.js";
+import { getOutputTeardownFiles, HASH_REGEX } from "../../../../../test/utils.js";
 import { Runner } from "gallinago";
 import { fileURLToPath } from "node:url";
 import { implementation } from "jsdom/lib/jsdom/living/nodes/HTMLStyleElement-impl.js";
@@ -144,7 +144,10 @@ describe("Build Greenwood With: ", function () {
             enter: function (node, item) {
               const { type, name } = node;
               if (type === "ClassSelector" && item.prev === null) {
-                const scopedClassNameRegex = new RegExp(String.raw`.header-\d+-${name}`, "g");
+                const scopedClassNameRegex = new RegExp(
+                  String.raw`.header-${HASH_REGEX}-${name}`,
+                  "g",
+                );
 
                 classes.push(name);
                 expect(styleText).to.match(scopedClassNameRegex);
@@ -170,7 +173,10 @@ describe("Build Greenwood With: ", function () {
             enter: function (node) {
               const { type, name } = node;
               if (type === "ClassSelector") {
-                const scopedClassNameRegex = new RegExp(String.raw`.header-\d+-${name}`, "g");
+                const scopedClassNameRegex = new RegExp(
+                  String.raw`.header-${HASH_REGEX}-${name}`,
+                  "g",
+                );
 
                 classes.push(name);
                 expect(bodyHtml).to.match(scopedClassNameRegex);
@@ -279,7 +285,10 @@ describe("Build Greenwood With: ", function () {
             enter: function (node, item) {
               const { type, name } = node;
               if (type === "ClassSelector" && item.prev === null) {
-                const scopedClassNameRegex = new RegExp(String.raw`.footer-\d+-${name}`, "g");
+                const scopedClassNameRegex = new RegExp(
+                  String.raw`.footer-${HASH_REGEX}-${name}`,
+                  "g",
+                );
 
                 classes.push(name);
                 expect(styleText).to.match(scopedClassNameRegex);
@@ -305,7 +314,10 @@ describe("Build Greenwood With: ", function () {
             enter: function (node, item) {
               const { type, name } = node;
               if (type === "ClassSelector" && item.prev === null) {
-                const scopedClassNameRegex = new RegExp(String.raw`.footer-\d+-${name}`, "g");
+                const scopedClassNameRegex = new RegExp(
+                  String.raw`.footer-${HASH_REGEX}-${name}`,
+                  "g",
+                );
 
                 classes.push(name);
                 expect(bodyHtml).to.match(scopedClassNameRegex);
@@ -373,22 +385,23 @@ describe("Build Greenwood With: ", function () {
       });
 
       describe("Logo component nested in <app-header> component", () => {
-        const scopedHash = 695811019;
-
         it("should have the expected logo CSS inlined into the style tag", () => {
           const styles = dom.window.document.querySelectorAll("head style");
-          const styleText = styles[0].textContent;
-          const expectedStyles = `.logo-${scopedHash}-container{display:flex}.logo-${scopedHash}-logo{display:inline-block;width:100%;}`;
+          const styleText = styles[0].textContent.replace(/\s+/g, "").replace(/;/g, "");
+          const expectedStyles = `.logo-${HASH_REGEX}-container{display:flex}.logo-${HASH_REGEX}-logo{display:inline-blockwidth:100%`;
 
-          expect(styleText).to.contain(expectedStyles);
+          expect(styleText).to.match(new RegExp(expectedStyles));
         });
 
         it("should have the expected logo CSS class names in the HTML", () => {
-          const classNames = [`logo-${scopedHash}-container`, `logo-${scopedHash}-logo`];
+          const classNames = [
+            new RegExp(`class="logo-${HASH_REGEX}-container"`),
+            new RegExp(`class="logo-${HASH_REGEX}-logo"`),
+          ];
           const bodyHtml = dom.window.document.querySelector("body").innerHTML;
 
           classNames.forEach((name) => {
-            expect(bodyHtml).to.contain(`class="${name}"`);
+            expect(bodyHtml).to.match(name);
           });
         });
       });
diff --git a/packages/plugin-graphql/src/core/common.js b/packages/plugin-graphql/src/core/common.js
index b5926930e..f7514fb70 100644
--- a/packages/plugin-graphql/src/core/common.js
+++ b/packages/plugin-graphql/src/core/common.js
@@ -1,4 +1,15 @@
-import { hashString } from "@greenwood/cli/src/lib/hashing-utils.js";
+// https://gist.github.com/hyamamoto/fd435505d29ebfa3d9716fd2be8d42f0#gistcomment-2775538
+function hashString(inputString) {
+  let h = 0;
+
+  for (let i = 0; i < inputString.length; i += 1) {
+    h = (Math.imul(31, h) + inputString.charCodeAt(i)) | 0;
+  }
+
+  return Math.abs(h).toString();
+}
+
+export { hashString };
 
 function getQueryHash(query, variables = {}) {
   const queryKeys = query;
diff --git a/packages/plugin-graphql/src/index.js b/packages/plugin-graphql/src/index.js
index 893b8b21e..20e1a47f3 100644
--- a/packages/plugin-graphql/src/index.js
+++ b/packages/plugin-graphql/src/index.js
@@ -3,8 +3,6 @@ import { graphqlServer } from "./core/server.js";
 import { mergeImportMap } from "@greenwood/cli/src/lib/node-modules-utils.js";
 
 const importMap = {
-  "@greenwood/cli/src/lib/hashing-utils.js":
-    "/node_modules/@greenwood/cli/src/lib/hashing-utils.js",
   "@greenwood/plugin-graphql/src/core/client.js":
     "/node_modules/@greenwood/plugin-graphql/src/core/client.js",
   "@greenwood/plugin-graphql/src/core/common.js":
diff --git a/packages/plugin-graphql/test/unit/common.spec.js b/packages/plugin-graphql/test/unit/common.spec.js
index 026b4e0de..36ad7de10 100644
--- a/packages/plugin-graphql/test/unit/common.spec.js
+++ b/packages/plugin-graphql/test/unit/common.spec.js
@@ -1,5 +1,6 @@
 import chai from "chai";
 import { getQueryHash } from "../../src/core/common.js";
+import { HASH_REGEX } from "../../../../test/utils.js";
 
 const expect = chai.expect;
 
@@ -21,7 +22,7 @@ describe("Unit Test: Data", function () {
         `;
         const hash = getQueryHash(query);
 
-        expect(hash).to.be.equal("309961297");
+        expect(hash).to.match(new RegExp(HASH_REGEX));
       });
 
       it("should return the expected hash for a custom graph query with custom data", function () {
@@ -39,7 +40,7 @@ describe("Unit Test: Data", function () {
         `;
         const hash = getQueryHash(query);
 
-        expect(hash).to.be.equal("1136154652");
+        expect(hash).to.match(new RegExp(HASH_REGEX));
       });
 
       it("should return the expected hash for a children query with a variable", function () {
@@ -57,7 +58,7 @@ describe("Unit Test: Data", function () {
           parent: "/docs/",
         });
 
-        expect(hash).to.be.equal("1893453381");
+        expect(hash).to.match(new RegExp(HASH_REGEX));
       });
     });
   });
diff --git a/packages/plugin-markdown/test/cases/build.default.workspace-frontmatter-imports/build.default.workspace-frontmatter-imports.spec.js b/packages/plugin-markdown/test/cases/build.default.workspace-frontmatter-imports/build.default.workspace-frontmatter-imports.spec.js
index e4739f0a8..09c0ac9dc 100644
--- a/packages/plugin-markdown/test/cases/build.default.workspace-frontmatter-imports/build.default.workspace-frontmatter-imports.spec.js
+++ b/packages/plugin-markdown/test/cases/build.default.workspace-frontmatter-imports/build.default.workspace-frontmatter-imports.spec.js
@@ -35,7 +35,7 @@ import fs from "node:fs";
 import glob from "glob-promise";
 import { JSDOM } from "jsdom";
 import path from "node:path";
-import { getOutputTeardownFiles } from "../../../../../test/utils.js";
+import { getOutputTeardownFiles, HASH_REGEX } from "../../../../../test/utils.js";
 import { runSmokeTest } from "../../../../../test/smoke-test.js";
 import { Runner } from "gallinago";
 import { fileURLToPath } from "node:url";
@@ -122,10 +122,9 @@ describe("Build Greenwood With: ", function () {
         });
 
         it("should have expected attributes on the `<link>` tag from frontmatter imports", async function () {
+          const regex = new RegExp(`/components/counter/counter.${HASH_REGEX}.css`);
           const link = Array.from(dom.window.document.querySelectorAll("head link")).find(
-            (link) =>
-              link.getAttribute("href") === "/components/counter/counter.1173776585.css" &&
-              link.rel !== "preload",
+            (link) => regex.test(link.getAttribute("href")) && link.rel !== "preload",
           );
 
           expect(link.getAttribute("data-gwd-opt")).to.equal(null);
diff --git a/packages/plugin-postcss/test/cases/loaders-default.import-attributes/loaders-default.import-attributes.spec.js b/packages/plugin-postcss/test/cases/loaders-default.import-attributes/loaders-default.import-attributes.spec.js
index 1d6448d22..e066b86a3 100644
--- a/packages/plugin-postcss/test/cases/loaders-default.import-attributes/loaders-default.import-attributes.spec.js
+++ b/packages/plugin-postcss/test/cases/loaders-default.import-attributes/loaders-default.import-attributes.spec.js
@@ -33,7 +33,7 @@ import fs from "node:fs";
 import glob from "glob-promise";
 import path from "node:path";
 import { runSmokeTest } from "../../../../../test/smoke-test.js";
-import { getOutputTeardownFiles } from "../../../../../test/utils.js";
+import { getOutputTeardownFiles, HASH_REGEX } from "../../../../../test/utils.js";
 import { Runner } from "gallinago";
 import { fileURLToPath } from "node:url";
 
@@ -74,13 +74,14 @@ describe("Build Greenwood With: ", function () {
         const headerFiles = glob.sync(path.join(this.context.publicDir, "header.*.js"));
         const js = fs.readFileSync(headerFiles[0], "utf-8");
 
-        expect(headerFiles.length).to.equal(1);
-        expect(
-          js.indexOf('import e from"/styles/theme.548942254.css"with{type:"css"};') >= 0,
-        ).to.equal(true);
-        expect(js.indexOf('import t from"/header.VW6HLTom.css"with{type:"css"};') >= 0).to.equal(
-          true,
+        const themeRegex = new RegExp(
+          `import e from"/styles/theme.${HASH_REGEX}.css"with{type:"css"};`,
         );
+        const headerRegex = new RegExp(`import t from"/header.${HASH_REGEX}.css"with{type:"css"};`);
+
+        expect(headerFiles.length).to.equal(1);
+        expect(js).to.match(themeRegex);
+        expect(js).to.match(headerRegex);
         expect(
           js.indexOf(
             "const s=new CSSStyleSheet;s.replaceSync('.spectrum{--spectrum-font-family-ar:myriad-arabic",
diff --git a/packages/plugin-renderer-puppeteer/test/cases/build.default/build.default.spec.js b/packages/plugin-renderer-puppeteer/test/cases/build.default/build.default.spec.js
index 3ad91ca1b..65ec73104 100644
--- a/packages/plugin-renderer-puppeteer/test/cases/build.default/build.default.spec.js
+++ b/packages/plugin-renderer-puppeteer/test/cases/build.default/build.default.spec.js
@@ -30,7 +30,7 @@ import glob from "glob-promise";
 import { JSDOM } from "jsdom";
 import path from "node:path";
 import { runSmokeTest } from "../../../../../test/smoke-test.js";
-import { getOutputTeardownFiles } from "../../../../../test/utils.js";
+import { getOutputTeardownFiles, HASH_REGEX } from "../../../../../test/utils.js";
 import { Runner } from "gallinago";
 import { fileURLToPath } from "node:url";
 
@@ -137,10 +137,10 @@ describe("Build Greenwood With: ", function () {
         const inlineScriptTag = Array.from(
           dom.window.document.querySelectorAll("head > script:not([src])"),
         ).filter((tag) => !tag.getAttribute("data-gwd"))[0];
-
-        expect(inlineScriptTag.textContent.replace("\n", "")).to.contain(
-          'import"/lit-element.5o_Y6C1Q.js";document.getElementsByClassName("output-script-inline")[0].innerHTML="script tag module inline";//# sourceMappingURL=1644043439.CKFVi45M.js.map',
+        const regex = new RegExp(
+          `import"/lit-element\\.${HASH_REGEX}\\.js";document\\.getElementsByClassName\\("output-script-inline"\\)\\[0\\]\\.innerHTML="script tag module inline";//# sourceMappingURL=${HASH_REGEX}\\.${HASH_REGEX}\\.js\\.map`,
         );
+        expect(inlineScriptTag.textContent.replace("\n", "")).to.match(regex);
       });
 
       it("should have prerendered content from <app-header> component", function () {
diff --git a/test/utils.js b/test/utils.js
index adbcbabe9..a92a858b9 100644
--- a/test/utils.js
+++ b/test/utils.js
@@ -30,4 +30,6 @@ async function getDependencyFiles(sourcePath, outputPath) {
   });
 }
 
-export { getDependencyFiles, getOutputTeardownFiles, tagsMatch };
+const HASH_REGEX = "[a-zA-Z0-9-_]{8}";
+
+export { getDependencyFiles, getOutputTeardownFiles, tagsMatch, HASH_REGEX };