diff --git a/packages/formspree-core/test/core.test.ts b/packages/formspree-core/test/core.test.ts
index 83ae752..4c3a2a5 100644
--- a/packages/formspree-core/test/core.test.ts
+++ b/packages/formspree-core/test/core.test.ts
@@ -390,7 +390,7 @@ describe('Client.submitForm', () => {
               headers: {
                 Accept: 'application/json',
                 'Content-Type': 'application/json',
-                'Formspree-Client': '@formspree/core@2.8.3',
+                'Formspree-Client': `@formspree/core@${version}`,
                 'Formspree-Session-Data': expectedSessionData,
               },
               method: 'POST',
@@ -434,7 +434,7 @@ describe('Client.submitForm', () => {
               headers: {
                 Accept: 'application/json',
                 'Content-Type': 'application/json',
-                'Formspree-Client': '@formspree/core@2.8.3',
+                'Formspree-Client': `@formspree/core@${version}`,
                 'Formspree-Session-Data': expectedSessionData,
               },
               method: 'POST',
@@ -489,7 +489,7 @@ describe('Client.submitForm', () => {
                 headers: {
                   Accept: 'application/json',
                   'Content-Type': 'application/json',
-                  'Formspree-Client': '@formspree/core@2.8.3',
+                  'Formspree-Client': `@formspree/core@${version}`,
                   'Formspree-Session-Data': expectedSessionData,
                 },
                 method: 'POST',
@@ -551,7 +551,7 @@ describe('Client.submitForm', () => {
                 body: data,
                 headers: {
                   Accept: 'application/json',
-                  'Formspree-Client': '@formspree/core@2.8.3',
+                  'Formspree-Client': `@formspree/core@${version}`,
                   'Formspree-Session-Data': expectedSessionData,
                 },
                 method: 'POST',
@@ -565,7 +565,7 @@ describe('Client.submitForm', () => {
                 body: data,
                 headers: {
                   Accept: 'application/json',
-                  'Formspree-Client': '@formspree/core@2.8.3',
+                  'Formspree-Client': `@formspree/core@${version}`,
                   'Formspree-Session-Data': expectedSessionData,
                 },
                 method: 'POST',
@@ -614,7 +614,7 @@ describe('Client.submitForm', () => {
                 headers: {
                   Accept: 'application/json',
                   'Content-Type': 'application/json',
-                  'Formspree-Client': '@formspree/core@2.8.3',
+                  'Formspree-Client': `@formspree/core@${version}`,
                   'Formspree-Session-Data': expectedSessionData,
                 },
                 method: 'POST',
@@ -634,7 +634,7 @@ describe('Client.submitForm', () => {
                 headers: {
                   Accept: 'application/json',
                   'Content-Type': 'application/json',
-                  'Formspree-Client': '@formspree/core@2.8.3',
+                  'Formspree-Client': `@formspree/core@${version}`,
                   'Formspree-Session-Data': expectedSessionData,
                 },
                 method: 'POST',
diff --git a/packages/formspree-react/test/useForm.test.tsx b/packages/formspree-react/test/useForm.test.tsx
index 2018487..74d976b 100644
--- a/packages/formspree-react/test/useForm.test.tsx
+++ b/packages/formspree-react/test/useForm.test.tsx
@@ -79,7 +79,9 @@ describe('useForm', () => {
           body: expect.any(FormData),
           headers: {
             Accept: 'application/json',
-            'Formspree-Client': '@formspree/react@2.4.4 @formspree/core@2.8.3',
+            'Formspree-Client': expect.stringMatching(
+              /^@formspree\/react@[\d.]+ @formspree\/core@[\d.]+$/
+            ),
             'Formspree-Session-Data': expect.any(String),
           },
           method: 'POST',
@@ -141,7 +143,9 @@ describe('useForm', () => {
           body: expect.any(FormData),
           headers: {
             Accept: 'application/json',
-            'Formspree-Client': '@formspree/react@2.4.4 @formspree/core@2.8.3',
+            'Formspree-Client': expect.stringMatching(
+              /^@formspree\/react@[\d.]+ @formspree\/core@[\d.]+$/
+            ),
             'Formspree-Session-Data': expect.any(String),
           },
           method: 'POST',