diff --git a/src/forms/ContactDetailsForm/ContactDetailsForm.js b/src/forms/ContactDetailsForm/ContactDetailsForm.js
index 36b8df68..b4ae414d 100644
--- a/src/forms/ContactDetailsForm/ContactDetailsForm.js
+++ b/src/forms/ContactDetailsForm/ContactDetailsForm.js
@@ -316,7 +316,6 @@ class ContactDetailsFormComponent extends Component {
               <div className={css.bottomWrapper}>
                 {genericError}
                 <PrimaryButton
-                  className={css.submitButton}
                   type="submit"
                   inProgress={inProgress}
                   ready={pristineSinceLastSubmit}
diff --git a/src/forms/LoginForm/LoginForm.js b/src/forms/LoginForm/LoginForm.js
index 1e869811..17e5dece 100644
--- a/src/forms/LoginForm/LoginForm.js
+++ b/src/forms/LoginForm/LoginForm.js
@@ -93,12 +93,7 @@ const LoginFormComponent = props => (
                 />
               </span>
             </p>
-            <PrimaryButton
-              className={css.submitButton}
-              type="submit"
-              inProgress={submitInProgress}
-              disabled={submitDisabled}
-            >
+            <PrimaryButton type="submit" inProgress={submitInProgress} disabled={submitDisabled}>
               <FormattedMessage id="LoginForm.logIn" />
             </PrimaryButton>
           </div>
diff --git a/src/forms/PasswordChangeForm/PasswordChangeForm.js b/src/forms/PasswordChangeForm/PasswordChangeForm.js
index f023f0f1..5df3eaa8 100644
--- a/src/forms/PasswordChangeForm/PasswordChangeForm.js
+++ b/src/forms/PasswordChangeForm/PasswordChangeForm.js
@@ -183,7 +183,6 @@ class PasswordChangeFormComponent extends Component {
               <div className={css.bottomWrapper}>
                 {genericFailure}
                 <PrimaryButton
-                  className={css.submitButton}
                   type="submit"
                   inProgress={inProgress}
                   ready={ready}
diff --git a/src/forms/SignupForm/SignupForm.js b/src/forms/SignupForm/SignupForm.js
index e5a67ce3..becfb7af 100644
--- a/src/forms/SignupForm/SignupForm.js
+++ b/src/forms/SignupForm/SignupForm.js
@@ -184,12 +184,7 @@ const SignupFormComponent = props => (
                 />
               </span>
             </p>
-            <PrimaryButton
-              className={css.submitButton}
-              type="submit"
-              inProgress={submitInProgress}
-              disabled={submitDisabled}
-            >
+            <PrimaryButton type="submit" inProgress={submitInProgress} disabled={submitDisabled}>
               <FormattedMessage id="SignupForm.signUp" />
             </PrimaryButton>
           </div>