diff --git a/tests/config/constants.js b/tests/config/constants.js
new file mode 100644
index 000000000..e6c7c16a0
--- /dev/null
+++ b/tests/config/constants.js
@@ -0,0 +1,11 @@
+import path from "node:path";
+import createEsmUtils from "esm-utils";
+import { normalizeDirectory } from "./utilities.js";
+
+const { __dirname } = createEsmUtils(import.meta);
+
+export const FORMAT_TEST_DIRECTORY = normalizeDirectory(
+  path.join(__dirname, "../format/"),
+);
+
+export const CURSOR_PLACEHOLDER = "<|>";
diff --git a/tests/config/failed-format-tests.js b/tests/config/failed-format-tests.js
new file mode 100644
index 000000000..795dd9e49
--- /dev/null
+++ b/tests/config/failed-format-tests.js
@@ -0,0 +1,63 @@
+import path from "node:path";
+import { FORMAT_TEST_DIRECTORY } from "./constants.js";
+
+// Here we add files that will not be the same when formatting a second time.
+const unstableTests = new Map(
+  [].map((fixture) => {
+    const [file, isUnstable = () => true] = Array.isArray(fixture)
+      ? fixture
+      : [fixture];
+    return [path.join(FORMAT_TEST_DIRECTORY, file), isUnstable];
+  }),
+);
+
+// Here we add files that will not have the same AST after being formatted.
+const unstableAstTests = new Map(
+  [
+    // `: =` and `= :` are syntactically the same as `:=` and `=:`, but the ast
+    // changes from `YulColonAndEqual` and `YulEqualAndColon` to `ColonEqual`
+    // and `EqualColon`, which is expected but the workaround to keep the test
+    // stable is too much, so we just put it in this list.
+    "AssemblyV0.4.26/Assembly.sol",
+  ].map((fixture) => {
+    const [file, isUnstable = () => true] = Array.isArray(fixture)
+      ? fixture
+      : [fixture];
+    return [path.join(FORMAT_TEST_DIRECTORY, file), isUnstable];
+  }),
+);
+
+const antlrMismatchTests = new Map(
+  [
+    // Better placement of comments in Slang.
+    "BasicIterator/BasicIterator.sol",
+    "Comments/Comments.sol",
+    "IndexOf/IndexOf.sol",
+    // Syntax for `pragma solidity 0.5.0 - 0.6.0;` not supported by ANTLR
+    "Pragma/Pragma.sol",
+    // ANTLR doesn't support assembly assignment operators separated by a space
+    // like `: =` or `= :`
+    "AssemblyV0.4.26/Assembly.sol",
+    // ANTLR doesn't support UntypedTupleMember with a storage location, which
+    // is valid Slang, but not in Solidity.
+    "AllSolidityFeaturesV0.4.26/AllSolidityFeatures.sol",
+    // TODO Review how ANTLR is formatting chained assignments
+    "Assignments/Assignments.sol",
+  ].map((fixture) => {
+    const [file, isUnstable = () => true] = Array.isArray(fixture)
+      ? fixture
+      : [fixture];
+    return [path.join(FORMAT_TEST_DIRECTORY, file), isUnstable];
+  }),
+);
+
+const isUnstable = (filepath, options) =>
+  unstableTests.get(filepath)?.(options);
+
+const isAstUnstable = (filepath, options) =>
+  unstableAstTests.get(filepath)?.(options);
+
+const isAntlrMismatch = (filepath, options) =>
+  antlrMismatchTests.get(filepath)?.(options);
+
+export { isAstUnstable, isUnstable, isAntlrMismatch };
diff --git a/tests/config/run-format-test.js b/tests/config/run-format-test.js
index 8cadbf577..3d0c5477e 100644
--- a/tests/config/run-format-test.js
+++ b/tests/config/run-format-test.js
@@ -11,6 +11,11 @@ import consistentEndOfLine from "./utils/consistent-end-of-line.js";
 import createSnapshot from "./utils/create-snapshot.js";
 import { stringifyOptionsForTitle } from "./utils/stringify-options-for-title.js";
 import visualizeEndOfLine from "./utils/visualize-end-of-line.js";
+import {
+  isAntlrMismatch,
+  isAstUnstable,
+  isUnstable,
+} from "./failed-format-tests.js";
 
 const { __dirname } = createEsmUtils(import.meta);
 
@@ -21,32 +26,6 @@ const CURSOR_PLACEHOLDER = "<|>";
 const RANGE_START_PLACEHOLDER = "<<<PRETTIER_RANGE_START>>>";
 const RANGE_END_PLACEHOLDER = "<<<PRETTIER_RANGE_END>>>";
 
-// Here we add files that will not be the same when formatting a second time.
-const unstableTests = new Map(
-  [].map((fixture) => {
-    const [file, isUnstable = () => true] = Array.isArray(fixture)
-      ? fixture
-      : [fixture];
-    return [path.join(__dirname, "../format/", file), isUnstable];
-  }),
-);
-
-// Here we add files that will not have the same AST after being formatted.
-const unstableAstTests = new Map(
-  [
-    // `: =` and `= :` are syntactically the same as `:=` and `=:`, but the ast
-    // changes from `YulColonAndEqual` and `YulEqualAndColon` to `ColonEqual`
-    // and `EqualColon`, which is expected but the workaround to keep the test
-    // stable is too much, so we just put it in this list.
-    "AssemblyV0.4.26/Assembly.sol",
-  ].map((fixture) => {
-    const [file, isAstUnstable = () => true] = Array.isArray(fixture)
-      ? fixture
-      : [fixture];
-    return [path.join(__dirname, "../format/", file), isAstUnstable];
-  }),
-);
-
 const testsWithAstChanges = new Map(
   [
     "Parentheses/AddNoParentheses.sol",
@@ -71,60 +50,6 @@ const testsWithAstChanges = new Map(
   }),
 );
 
-const antlrMismatchTests = new Map(
-  [
-    // Better placement of comments in Slang.
-    "BasicIterator/BasicIterator.sol",
-    "Comments/Comments.sol",
-    "IndexOf/IndexOf.sol",
-    // Syntax for `pragma solidity 0.5.0 - 0.6.0;` not supported by ANTLR
-    "Pragma/Pragma.sol",
-    // ANTLR doesn't support assembly assignment operators separated by a space
-    // like `: =` or `= :`
-    "AssemblyV0.4.26/Assembly.sol",
-    // ANTLR doesn't support UntypedTupleMember with a storage location, which
-    // is valid Slang, but not in Solidity.
-    "AllSolidityFeaturesV0.4.26/AllSolidityFeatures.sol",
-    // TODO Review how ANTLR is formatting chained assignments
-    "Assignments/Assignments.sol",
-  ].map((fixture) => {
-    const [file, compareBytecode = () => true] = Array.isArray(fixture)
-      ? fixture
-      : [fixture];
-    return [path.join(__dirname, "../format/", file), compareBytecode];
-  }),
-);
-
-const isUnstable = (filename, options) => {
-  const testFunction = unstableTests.get(filename);
-
-  if (!testFunction) {
-    return false;
-  }
-
-  return testFunction(options);
-};
-
-const isAstUnstable = (filename, options) => {
-  const testFunction = unstableAstTests.get(filename);
-
-  if (!testFunction) {
-    return false;
-  }
-
-  return testFunction(options);
-};
-
-const isAntlrMismatch = (filename, options) => {
-  const testFunction = antlrMismatchTests.get(filename);
-
-  if (!testFunction) {
-    return false;
-  }
-
-  return testFunction(options);
-};
-
 const shouldCompareBytecode = (filename, options) => {
   const testFunction = testsWithAstChanges.get(filename);
 
diff --git a/tests/config/utilities.js b/tests/config/utilities.js
new file mode 100644
index 000000000..bed70134e
--- /dev/null
+++ b/tests/config/utilities.js
@@ -0,0 +1,5 @@
+import path from "node:path";
+
+const normalizeDirectory = (directory) => path.normalize(directory + path.sep);
+
+export { normalizeDirectory };
diff --git a/tests/config/utils/create-snapshot.js b/tests/config/utils/create-snapshot.js
index aa91625b7..510a30846 100644
--- a/tests/config/utils/create-snapshot.js
+++ b/tests/config/utils/create-snapshot.js
@@ -1,9 +1,8 @@
 import { wrap as raw } from "jest-snapshot-serializer-raw";
+import { CURSOR_PLACEHOLDER } from "../constants.js";
 import visualizeEndOfLine from "./visualize-end-of-line.js";
 import visualizeRange from "./visualize-range.js";
 
-const CURSOR_PLACEHOLDER = "<|>";
-
 const DEFAULT_PRINT_WIDTH = 80;
 const SEPARATOR_WIDTH = DEFAULT_PRINT_WIDTH;
 function printSeparator(description = "") {