diff --git a/wp-admin/import.php b/wp-admin/import.php
index 7326f185c1..e732c55b8f 100644
--- a/wp-admin/import.php
+++ b/wp-admin/import.php
@@ -156,7 +156,7 @@ if ( empty( $importers ) ) {
 						esc_attr( $plugin_slug ),
 						esc_attr( $data[0] ),
 						/* translators: %s: Importer name. */
-						esc_attr( sprintf( __( 'Install %s now' ), $data[0] ) ),
+						esc_attr( sprintf( _x( 'Install %s now', 'plugin' ), $data[0] ) ),
 						__( 'Install Now' )
 					);
 				} else {
diff --git a/wp-admin/includes/class-wp-plugin-install-list-table.php b/wp-admin/includes/class-wp-plugin-install-list-table.php
index e22f203e2b..fe160cbd8b 100644
--- a/wp-admin/includes/class-wp-plugin-install-list-table.php
+++ b/wp-admin/includes/class-wp-plugin-install-list-table.php
@@ -528,7 +528,7 @@ class WP_Plugin_Install_List_Table extends WP_List_Table {
 									esc_attr( $plugin['slug'] ),
 									esc_url( $status['url'] ),
 									/* translators: %s: Plugin name and version. */
-									esc_attr( sprintf( __( 'Install %s now' ), $name ) ),
+									esc_attr( sprintf( _x( 'Install %s now', 'plugin' ), $name ) ),
 									esc_attr( $name ),
 									__( 'Install Now' )
 								);
@@ -550,7 +550,7 @@ class WP_Plugin_Install_List_Table extends WP_List_Table {
 									esc_attr( $plugin['slug'] ),
 									esc_url( $status['url'] ),
 									/* translators: %s: Plugin name and version. */
-									esc_attr( sprintf( __( 'Update %s now' ), $name ) ),
+									esc_attr( sprintf( _x( 'Update %s now', 'plugin' ), $name ) ),
 									esc_attr( $name ),
 									__( 'Update Now' )
 								);
diff --git a/wp-admin/includes/class-wp-theme-install-list-table.php b/wp-admin/includes/class-wp-theme-install-list-table.php
index 98eb212b26..37ee8d459d 100644
--- a/wp-admin/includes/class-wp-theme-install-list-table.php
+++ b/wp-admin/includes/class-wp-theme-install-list-table.php
@@ -323,7 +323,7 @@ class WP_Theme_Install_List_Table extends WP_Themes_List_Table {
 					'<a class="install-now" href="%s" title="%s">%s</a>',
 					esc_url( wp_nonce_url( $install_url, 'install-theme_' . $theme->slug ) ),
 					/* translators: %s: Theme name. */
-					esc_attr( sprintf( __( 'Install %s' ), $name ) ),
+					esc_attr( sprintf( _x( 'Install %s', 'theme' ), $name ) ),
 					__( 'Install Now' )
 				);
 				break;
diff --git a/wp-admin/includes/deprecated.php b/wp-admin/includes/deprecated.php
index 47201332dd..ede053de6f 100644
--- a/wp-admin/includes/deprecated.php
+++ b/wp-admin/includes/deprecated.php
@@ -1379,7 +1379,7 @@ function wp_dashboard_plugins_output( $rss, $args = array() ) {
 		echo '<li class="dashboard-news-plugin"><span>' . __( 'Popular Plugin' ) . ':</span> ' . esc_html( $raw_title ) .
 			'&nbsp;<a href="' . $ilink . '" class="thickbox open-plugin-details-modal" aria-label="' .
 			/* translators: %s: Plugin name. */
-			esc_attr( sprintf( __( 'Install %s' ), $raw_title ) ) . '">(' . __( 'Install' ) . ')</a></li>';
+			esc_attr( sprintf( _x( 'Install %s', 'plugin' ), $raw_title ) ) . '">(' . __( 'Install' ) . ')</a></li>';
 
 		$feed->__destruct();
 		unset( $feed );
diff --git a/wp-admin/includes/theme.php b/wp-admin/includes/theme.php
index 1839c939cb..adf642867c 100644
--- a/wp-admin/includes/theme.php
+++ b/wp-admin/includes/theme.php
@@ -240,7 +240,7 @@ function get_theme_update_available( $theme ) {
 					sprintf(
 						'aria-label="%s" id="update-theme" data-slug="%s"',
 						/* translators: %s: Theme name. */
-						esc_attr( sprintf( __( 'Update %s now' ), $theme_name ) ),
+						esc_attr( sprintf( _x( 'Update %s now', 'theme' ), $theme_name ) ),
 						$stylesheet
 					)
 				);
diff --git a/wp-admin/includes/update.php b/wp-admin/includes/update.php
index 0d9fab024b..8a588921f0 100644
--- a/wp-admin/includes/update.php
+++ b/wp-admin/includes/update.php
@@ -509,7 +509,7 @@ function wp_plugin_update_row( $file, $plugin_data ) {
 					sprintf(
 						'class="update-link" aria-label="%s"',
 						/* translators: %s: Plugin name. */
-						esc_attr( sprintf( __( 'Update %s now' ), $plugin_name ) )
+						esc_attr( sprintf( _x( 'Update %s now', 'plugin' ), $plugin_name ) )
 					)
 				);
 			} else {
@@ -694,7 +694,7 @@ function wp_theme_update_row( $theme_key, $theme ) {
 			sprintf(
 				'class="update-link" aria-label="%s"',
 				/* translators: %s: Theme name. */
-				esc_attr( sprintf( __( 'Update %s now' ), $theme['Name'] ) )
+				esc_attr( sprintf( _x( 'Update %s now', 'theme' ), $theme['Name'] ) )
 			)
 		);
 	}
diff --git a/wp-admin/js/updates.js b/wp-admin/js/updates.js
index 6990ce8e59..4cf5f46078 100644
--- a/wp-admin/js/updates.js
+++ b/wp-admin/js/updates.js
@@ -813,8 +813,8 @@
 				'aria-label',
 				sprintf(
 					/* translators: %s: Plugin name. */
-					 _x( 'Install %s now', 'plugin' ),
-					 pluginName
+					_x( 'Install %s now', 'plugin' ),
+					pluginName
 				)
 			)
 			.text( __( 'Install Now' ) );
diff --git a/wp-admin/theme-install.php b/wp-admin/theme-install.php
index 89ac910e9c..3746d0040e 100644
--- a/wp-admin/theme-install.php
+++ b/wp-admin/theme-install.php
@@ -323,14 +323,14 @@ if ( $tab ) {
 				<# if ( data.compatible_wp && data.compatible_php ) { #>
 					<?php
 					/* translators: %s: Theme name. */
-					$aria_label = sprintf( __( 'Install %s' ), '{{ data.name }}' );
+					$aria_label = sprintf( _x( 'Install %s', 'theme' ), '{{ data.name }}' );
 					?>
 					<a class="button button-primary theme-install" data-name="{{ data.name }}" data-slug="{{ data.id }}" href="{{ data.install_url }}" aria-label="<?php echo esc_attr( $aria_label ); ?>"><?php _e( 'Install' ); ?></a>
 					<button class="button preview install-theme-preview"><?php _e( 'Preview' ); ?></button>
 				<# } else { #>
 					<?php
 					/* translators: %s: Theme name. */
-					$aria_label = sprintf( __( 'Cannot Install %s' ), '{{ data.name }}' );
+					$aria_label = sprintf( _x( 'Cannot Install %s', 'theme' ), '{{ data.name }}' );
 					?>
 					<a class="button button-primary disabled" data-name="{{ data.name }}" aria-label="<?php echo esc_attr( $aria_label ); ?>"><?php _ex( 'Cannot Install', 'theme' ); ?></a>
 					<button class="button disabled"><?php _e( 'Preview' ); ?></button>
diff --git a/wp-includes/version.php b/wp-includes/version.php
index d2cc4b04db..26421ac0dc 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.5-beta2-48519';
+$wp_version = '5.5-beta2-48520';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.