diff --git a/packages/better-auth/src/plugins/custom-session/custom-session.test.ts b/packages/better-auth/src/plugins/custom-session/custom-session.test.ts
index 5301281ecb..e96b431259 100644
--- a/packages/better-auth/src/plugins/custom-session/custom-session.test.ts
+++ b/packages/better-auth/src/plugins/custom-session/custom-session.test.ts
@@ -93,42 +93,43 @@ describe("Custom Session Plugin Tests", async () => {
 		expect(session.newData).toEqual({ message: "Hello, World!" });
 	});
 
-	it("should not create memory leaks with multiple plugin instances", async () => {
-		const initialMemory = process.memoryUsage();
+	it.skipIf(globalThis.gc == null)(
+		"should not create memory leaks with multiple plugin instances",
+		async () => {
+			const initialMemory = process.memoryUsage();
 
-		const pluginInstances = [];
-		const sessionCount = 100;
+			const pluginInstances = [];
+			const sessionCount = 100;
 
-		for (let i = 0; i < sessionCount; i++) {
-			const plugin = customSession(async ({ user, session }) => {
-				return {
-					user: {
-						...user,
-						testField: `test-${i}`,
-					},
-					session,
-					iteration: i,
-				};
-			});
-			pluginInstances.push(plugin);
-		}
+			for (let i = 0; i < sessionCount; i++) {
+				const plugin = customSession(async ({ user, session }) => {
+					return {
+						user: {
+							...user,
+							testField: `test-${i}`,
+						},
+						session,
+						iteration: i,
+					};
+				});
+				pluginInstances.push(plugin);
+			}
+			// Force garbage collection (only works if Node.js is started with --expose-gc)
+			// @ts-expect-error
+			globalThis.gc();
 
-		// Force garbage collection if available (in test environment)
-		if (global.gc) {
-			global.gc();
-		}
+			const afterPluginCreation = process.memoryUsage();
 
-		const afterPluginCreation = process.memoryUsage();
-
-		const memoryIncrease =
-			afterPluginCreation.heapUsed - initialMemory.heapUsed;
-		const memoryIncreasePerPlugin = memoryIncrease / sessionCount;
-		// Each plugin instance should not use more than <5KB of memory
-		// (this is a reasonable threshold that indicates no major memory leak)
-		expect(memoryIncreasePerPlugin).toBeLessThan(5 * 1024);
-		// Verify that plugins are still functional
-		expect(pluginInstances).toHaveLength(sessionCount);
-		expect(pluginInstances[0].id).toBe("custom-session");
-		expect(pluginInstances[sessionCount - 1].id).toBe("custom-session");
-	});
+			const memoryIncrease =
+				afterPluginCreation.heapUsed - initialMemory.heapUsed;
+			const memoryIncreasePerPlugin = memoryIncrease / sessionCount;
+			// Each plugin instance should not use more than <5KB of memory
+			// (this is a reasonable threshold that indicates no major memory leak)
+			expect(memoryIncreasePerPlugin).toBeLessThan(5 * 1024);
+			// Verify that plugins are still functional
+			expect(pluginInstances).toHaveLength(sessionCount);
+			expect(pluginInstances[0].id).toBe("custom-session");
+			expect(pluginInstances[sessionCount - 1].id).toBe("custom-session");
+		},
+	);
 });
diff --git a/packages/better-auth/vitest.config.ts b/packages/better-auth/vitest.config.ts
new file mode 100644
index 0000000000..9b231fc614
--- /dev/null
+++ b/packages/better-auth/vitest.config.ts
@@ -0,0 +1,11 @@
+import { defineConfig } from "vitest/config";
+
+export default defineConfig({
+	test: {
+		poolOptions: {
+			forks: {
+				execArgv: ["--expose-gc"],
+			},
+		},
+	},
+});
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 68a4d30299..bbe2118429 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -10,8 +10,8 @@ catalogs:
       specifier: ^1.1.18
       version: 1.1.18
     better-call:
-      specifier: 1.0.16
-      version: 1.0.16
+      specifier: 1.0.18
+      version: 1.0.18
     typescript:
       specifier: ^5.9.2
       version: 5.9.2
@@ -179,7 +179,7 @@ importers:
         version: link:../../packages/better-auth
       better-call:
         specifier: 'catalog:'
-        version: 1.0.16
+        version: 1.0.18
       better-sqlite3:
         specifier: ^12.2.0
         version: 12.2.0
@@ -626,7 +626,7 @@ importers:
         version: 13.1.2
       better-call:
         specifier: 'catalog:'
-        version: 1.0.16
+        version: 1.0.18
       defu:
         specifier: ^6.1.4
         version: 6.1.4
@@ -885,7 +885,7 @@ importers:
         version: link:../better-auth
       better-call:
         specifier: 'catalog:'
-        version: 1.0.16
+        version: 1.0.18
       express:
         specifier: ^5.1.0
         version: 5.1.0
@@ -901,7 +901,7 @@ importers:
         version: link:../better-auth
       better-call:
         specifier: 'catalog:'
-        version: 1.0.16
+        version: 1.0.18
       stripe:
         specifier: ^18.5.0
         version: 18.5.0(@types/node@24.3.0)
@@ -5783,8 +5783,8 @@ packages:
     resolution: {integrity: sha512-NF+epuEdnUYVlGuhaxbbq+dvJttwLnGY+YixlXlME5KpQ5W3CnXA5cVTneY3SPbPDRkcjMbifrwmFYcClgOZeg==}
     engines: {node: '>= 0.8'}
 
-  better-call@1.0.16:
-    resolution: {integrity: sha512-42dgJ1rOtc0anOoxjXPOWuel/Z/4aeO7EJ2SiXNwvlkySSgjXhNjAjTMWa8DL1nt6EXS3jl3VKC3mPsU/lUgVA==}
+  better-call@1.0.18:
+    resolution: {integrity: sha512-Ojyck3P3fs/egBmCW50tvfbCJorNV5KphfPOKrkCxPfOr8Brth1ruDtAJuhHVHEUiWrXv+vpEgWQk7m7FzhbbQ==}
 
   better-opn@3.0.2:
     resolution: {integrity: sha512-aVNobHnJqLiUelTaHat9DZ1qM2w0C0Eym4LPI/3JxOnSokGVdsl1T1kN7TFvsEAD8G47A6VKQ0TVHqbBnYMJlQ==}
@@ -18098,7 +18098,7 @@ snapshots:
     dependencies:
       safe-buffer: 5.1.2
 
-  better-call@1.0.16:
+  better-call@1.0.18:
     dependencies:
       '@better-fetch/fetch': 1.1.18
       rou3: 0.5.1
diff --git a/pnpm-workspace.yaml b/pnpm-workspace.yaml
index 5dc5cb8d3c..835516650f 100644
--- a/pnpm-workspace.yaml
+++ b/pnpm-workspace.yaml
@@ -11,7 +11,7 @@ catalogs:
     react: 19.1.1
     react-dom: 19.1.1
 catalog:
-  "better-call": "1.0.16"
+  "better-call": "1.0.18"
   "@better-fetch/fetch": "^1.1.18"
   "unbuild": "^3.6.1"
   "typescript": "^5.9.2"