diff --git src/wp-admin/includes/class-wp-debug-data.php src/wp-admin/includes/class-wp-debug-data.php
index 67d79b9369..e5ea327cb4 100644
--- src/wp-admin/includes/class-wp-debug-data.php
+++ src/wp-admin/includes/class-wp-debug-data.php
@@ -603,6 +603,8 @@ class WP_Debug_Data {
 				$formats = array();
 			}
 
+			$formats = array_diff( $formats, array( 'WEBP' ) );
+
 			$info['wp-media']['fields']['imagemagick_file_formats'] = array(
 				'label' => __( 'ImageMagick supported file formats' ),
 				'value' => ( empty( $formats ) ) ? __( 'Unable to determine' ) : implode( ', ', $formats ),
diff --git src/wp-includes/class-wp-image-editor-imagick.php src/wp-includes/class-wp-image-editor-imagick.php
index f413387233..570cac0063 100644
--- src/wp-includes/class-wp-image-editor-imagick.php
+++ src/wp-includes/class-wp-image-editor-imagick.php
@@ -108,6 +108,11 @@ class WP_Image_Editor_Imagick extends WP_Image_Editor {
 				return false;
 		}
 
+		// Disable support for WebP.
+		if ('image/webp' === $mime_type ) {
+			return false;
+		}
+
 		try {
 			// phpcs:ignore WordPress.PHP.NoSilencedErrors.Discouraged
 			return ( (bool) @Imagick::queryFormats( $imagick_extension ) );