diff --git a/testing/geckodriver/marionette/src/result.rs b/testing/geckodriver/marionette/src/result.rs
index 6cb33ec1ff12..218a06843763 100644
--- a/testing/geckodriver/marionette/src/result.rs
+++ b/testing/geckodriver/marionette/src/result.rs
@@ -30,6 +30,8 @@ pub struct ElementRect {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 #[serde(untagged)]
 pub enum MarionetteResult {
+    #[serde(deserialize_with = "from_value", serialize_with = "to_value")]
+    Bool(bool),
     #[serde(deserialize_with = "from_value", serialize_with = "to_empty_value")]
     Null,
     NewWindow(NewWindow),
@@ -96,6 +98,11 @@ mod tests {
     use crate::test::{assert_de, assert_ser_de, ELEMENT_KEY};
     use serde_json::json;
 
+    #[test]
+    fn test_boolean_response() {
+        assert_ser_de(&MarionetteResult::Bool(true), json!({"value": true}));
+    }
+
     #[test]
     fn test_cookies_response() {
         let mut data = Vec::new();
diff --git a/testing/geckodriver/marionette/src/webdriver.rs b/testing/geckodriver/marionette/src/webdriver.rs
index c90818d3e55d..d9dbb7061ca1 100644
--- a/testing/geckodriver/marionette/src/webdriver.rs
+++ b/testing/geckodriver/marionette/src/webdriver.rs
@@ -115,6 +115,12 @@ pub enum Command {
     GetWindowHandles,
     #[serde(rename = "WebDriver:GetWindowRect")]
     GetWindowRect,
+    #[serde(rename = "WebDriver:IsElementDisplayed")]
+    IsDisplayed(LegacyWebElement),
+    #[serde(rename = "WebDriver:IsElementEnabled")]
+    IsEnabled(LegacyWebElement),
+    #[serde(rename = "WebDriver:IsElementSelected")]
+    IsSelected(LegacyWebElement),
     #[serde(rename = "WebDriver:MaximizeWindow")]
     MaximizeWindow,
     #[serde(rename = "WebDriver:MinimizeWindow")]
diff --git a/testing/geckodriver/src/marionette.rs b/testing/geckodriver/src/marionette.rs
index 84efc1b26a97..387aa3e9d091 100644
--- a/testing/geckodriver/src/marionette.rs
+++ b/testing/geckodriver/src/marionette.rs
@@ -864,6 +864,15 @@ fn try_convert_to_marionette_message(
             MarionetteWebDriverCommand::GetWindowRect,
         )),
         GetTimeouts => Some(Command::WebDriver(MarionetteWebDriverCommand::GetTimeouts)),
+        IsDisplayed(ref x) => Some(Command::WebDriver(MarionetteWebDriverCommand::IsDisplayed(
+            x.to_marionette()?,
+        ))),
+        IsEnabled(ref x) => Some(Command::WebDriver(MarionetteWebDriverCommand::IsEnabled(
+            x.to_marionette()?,
+        ))),
+        IsSelected(ref x) => Some(Command::WebDriver(MarionetteWebDriverCommand::IsSelected(
+            x.to_marionette()?,
+        ))),
         MaximizeWindow => Some(Command::WebDriver(
             MarionetteWebDriverCommand::MaximizeWindow,
         )),
@@ -991,12 +1000,6 @@ impl MarionetteCommand {
                 GetTitle => (Some("WebDriver:GetTitle"), None),
                 GoBack => (Some("WebDriver:Back"), None),
                 GoForward => (Some("WebDriver:Forward"), None),
-                IsDisplayed(ref x) => (
-                    Some("WebDriver:IsElementDisplayed"),
-                    Some(x.to_marionette()),
-                ),
-                IsEnabled(ref x) => (Some("WebDriver:IsElementEnabled"), Some(x.to_marionette())),
-                IsSelected(ref x) => (Some("WebDriver:IsElementSelected"), Some(x.to_marionette())),
                 NewSession(_) => {
                     let caps = capabilities
                         .expect("Tried to create new session without processing capabilities");