diff --git a/CHANGES.md b/CHANGES.md
index 79911339511..f44b4e83077 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -6,6 +6,7 @@ Changes
 
 ### Unreleased
 
+* 2024-02-18 - Make codechecker happier
 * 2024-02-17 - Test: Use custom step to check the menus and menu items existence, resolves #365.
 * 2024-02-12 - Feature: Allow the admin to display activity icons in course content navigation, resolves #16.
 * 2024-02-11 - Child theme support: Improve namespace of class smartmenu_helper, resolves #494.
diff --git a/locallib.php b/locallib.php
index fdefe7d9266..718e8270317 100644
--- a/locallib.php
+++ b/locallib.php
@@ -915,7 +915,7 @@ function theme_boost_union_get_emailbrandinghtmlpreview() {
     $mail = $OUTPUT->render_from_template('core/email_html', $mailtemplatecontext);
 
     // And compose mail preview.
-    $previewtemplatecontext = ['mail' => $mail, 'type' => 'html', 'monospace' => false];
+    $previewtemplatecontext = ['mail' => $mail, 'type' => 'Html', 'monospace' => false];
     $preview = $OUTPUT->render_from_template('theme_boost_union/emailpreview', $previewtemplatecontext);
 
     return $preview;
@@ -946,7 +946,7 @@ function theme_boost_union_get_emailbrandingtextpreview() {
     $mail = nl2br($OUTPUT->render_from_template('core/email_text', $mailtemplatecontext));
 
     // And compose mail preview.
-    $previewtemplatecontext = ['mail' => $mail, 'type' => 'text', 'monospace' => true];
+    $previewtemplatecontext = ['mail' => $mail, 'type' => 'Text', 'monospace' => true];
     $preview = $OUTPUT->render_from_template('theme_boost_union/emailpreview', $previewtemplatecontext);
 
     return $preview;
diff --git a/templates/core_courseformat/local/courseindex/cm.mustache b/templates/core_courseformat/local/courseindex/cm.mustache
index cd44ffbfd4b..22a16ffb714 100644
--- a/templates/core_courseformat/local/courseindex/cm.mustache
+++ b/templates/core_courseformat/local/courseindex/cm.mustache
@@ -99,20 +99,20 @@ if (document.body.classList.contains('hascourseindexcmicons')) {
         const observer = new MutationObserver(function(mutations) {
             mutations.forEach(function(mutation) {
                 let node = mutation.target.childNodes[3];
-                if (node.id.startsWith('courseindex-cmicon-cplid-')){
-                    let completionel = document.getElementById(node.id);
+                if (node.id.startsWith('courseindex-cmicon-cplid-')) {
+                    let cplel = document.getElementById(node.id);
                     // Set the completion color for the icon based on the completion status.
-                    switch (node.dataset.value){
+                    switch (node.dataset.value) {
                         case 'NaN':
                             break;
                         case '0':
-                            completionel.closest('.courseindex-cmicon-container').classList.add('courseindex-cmicon-cpl-incomplete');
+                            cplel.closest('.courseindex-cmicon-container').classList.add('courseindex-cmicon-cpl-incomplete');
                             break;
                         case '1':
-                            completionel.closest('.courseindex-cmicon-container').classList.add('courseindex-cmicon-cpl-complete');
+                            cplel.closest('.courseindex-cmicon-container').classList.add('courseindex-cmicon-cpl-complete');
                             break;
                         case '3':
-                            completionel.closest('.courseindex-cmicon-container').classList.add('courseindex-cmicon-cpl-fail');
+                            cplel.closest('.courseindex-cmicon-container').classList.add('courseindex-cmicon-cpl-fail');
                             break;
                     }
                 }
diff --git a/templates/emailpreview.mustache b/templates/emailpreview.mustache
index 46697f9630d..68c25620951 100644
--- a/templates/emailpreview.mustache
+++ b/templates/emailpreview.mustache
@@ -25,7 +25,7 @@
     Example context (json):
     {
         "mail": "Lorem ipsum",
-        "type": "html",
+        "type": "Html",
         "monospace": false
     }
 }}
@@ -38,20 +38,20 @@
 <div class="shadow p-3 my-5 bg-white rounded {{#monospace}}text-monospace{{/monospace}}" id="theme_boost_union-email{{type}}preview-host"></div>
 {{#js}}
     // Get the host element.
-    const theme_boost_union_email{{type}}preview_host = document.querySelector('#theme_boost_union-email{{type}}preview-host');
+    const themeBoostUnionEmail{{type}}PreviewHost = document.querySelector('#theme_boost_union-email{{type}}preview-host');
 
     // Only if the host element exists on this page.
-    if (typeof(theme_boost_union_email{{type}}preview_host) != 'undefined' && theme_boost_union_email{{type}}preview_host != null) {
+    if (typeof (themeBoostUnionEmail{{type}}PreviewHost) != 'undefined' && themeBoostUnionEmail{{type}}PreviewHost !== null) {
         // If the browser supports Shadow DOM.
         if (document.body.attachShadow) {
             // Add the email content within a Shadow DOM.
-            const theme_boost_union_email{{type}}preview_shadow = theme_boost_union_email{{type}}preview_host.attachShadow({ mode: "open" });
-            const theme_boost_union_email{{type}}preview_template = document.getElementById('theme_boost_union-email{{type}}preview-shadow');
-            theme_boost_union_email{{type}}preview_shadow.appendChild(theme_boost_union_email{{type}}preview_template.content);
+            const themeBoostUnionEmail{{type}}PreviewShadow = themeBoostUnionEmail{{type}}PreviewHost.attachShadow({mode: "open"});
+            const themeBoostUnionEmail{{type}}PreviewTemplate = document.getElementById('theme_boost_union-email{{type}}preview-shadow');
+            themeBoostUnionEmail{{type}}PreviewShadow.appendChild(themeBoostUnionEmail{{type}}PreviewTemplate.content);
         } else {
             // Add the email content without Shadow DOM (which will result in style bleeding anyway).
-            const theme_boost_union_email{{type}}preview_template = document.getElementById('theme_boost_union-email{{type}}preview-shadow');
-            theme_boost_union_email{{type}}preview_host.appendChild(theme_boost_union_email{{type}}preview_template.content);
+            const themeBoostUnionEmail{{type}}PreviewTemplate = document.getElementById('theme_boost_union-email{{type}}preview-shadow');
+            themeBoostUnionEmail{{type}}PreviewHost.appendChild(themeBoostUnionEmail{{type}}PreviewTemplate.content);
         }
     }
 {{/js}}
diff --git a/templates/localloginform.mustache b/templates/localloginform.mustache
index fb73b7d3e18..b4a0c3c906e 100644
--- a/templates/localloginform.mustache
+++ b/templates/localloginform.mustache
@@ -27,7 +27,7 @@
     Example context (json):
     {
         "loginurl": "http://localhost/stable_master/login/index.php",
-        "logintoken": "randomstring",
+        "logintoken": "randomstring"
     }
 }}
 
diff --git a/templates/theme_boost/columns2.mustache b/templates/theme_boost/columns2.mustache
index 5759182dbf4..e46e27b370a 100644
--- a/templates/theme_boost/columns2.mustache
+++ b/templates/theme_boost/columns2.mustache
@@ -125,6 +125,6 @@ M.util.js_pending('theme_boost/loader');
 require(['theme_boost/loader', 'theme_boost/drawer'{{#includesmartmenu}}, 'theme_boost_union/smartmenu'{{/includesmartmenu}}], function(Loader, Drawer{{#includesmartmenu}}, SmartMenu{{/includesmartmenu}}) {
     Drawer.init();
     M.util.js_complete('theme_boost/loader');
-    {{#includesmartmenu}}SmartMenu.init();{{/includesmartmenu}}
+{{#includesmartmenu}}SmartMenu.init();{{/includesmartmenu}}
 });
 {{/js}}
diff --git a/templates/theme_boost/drawers.mustache b/templates/theme_boost/drawers.mustache
index 414eb6d0741..8ea398f573a 100644
--- a/templates/theme_boost/drawers.mustache
+++ b/templates/theme_boost/drawers.mustache
@@ -315,7 +315,7 @@ M.util.js_pending('theme_boost/loader');
 require(['theme_boost/loader', 'theme_boost/drawer'{{#regions.offcanvas.hasblocks}},'theme_boost_union/offcanvas'{{/regions.offcanvas.hasblocks}}{{#includesmartmenu}}, 'theme_boost_union/smartmenu'{{/includesmartmenu}}], function(Loader, Drawer{{#regions.offcanvas.hasblocks}},OffCanvas{{/regions.offcanvas.hasblocks}}{{#includesmartmenu}}, SmartMenu{{/includesmartmenu}}) {
     Drawer.init();
     M.util.js_complete('theme_boost/loader');
-    {{#regions.offcanvas.hasblocks}}OffCanvas.init();{{/regions.offcanvas.hasblocks}}
-    {{#includesmartmenu}}SmartMenu.init();{{/includesmartmenu}}
+{{#regions.offcanvas.hasblocks}}OffCanvas.init();{{/regions.offcanvas.hasblocks}}
+{{#includesmartmenu}}SmartMenu.init();{{/includesmartmenu}}
 });
 {{/js}}