diff --git a/resources/mode/mediawiki/mediawiki.js b/resources/mode/mediawiki/mediawiki.js
index a3723d7a..5f4d6add 100644
--- a/resources/mode/mediawiki/mediawiki.js
+++ b/resources/mode/mediawiki/mediawiki.js
@@ -744,7 +744,9 @@
 						}
 						break;
 					case '{':
-						if ( !stream.match( '{{{{', false ) && stream.match( '{{' ) ) { // Template parameter (skip parameters inside a template transclusion, Bug: T108450)
+						// Can't be a variable when it starts with more than 3 brackets (T108450) or
+						// a single { followed by a template. E.g. {{{!}} starts a table (T292967).
+						if ( stream.match( /^{{(?!{|[^{}]*}}(?!}))/ ) ) {
 							stream.eatSpace();
 							state.stack.push( state.tokenize );
 							state.tokenize = inVariable;
diff --git a/resources/mode/mediawiki/tests/qunit/CodeMirror.mediawiki.test.js b/resources/mode/mediawiki/tests/qunit/CodeMirror.mediawiki.test.js
index ef630698..0964cc93 100644
--- a/resources/mode/mediawiki/tests/qunit/CodeMirror.mediawiki.test.js
+++ b/resources/mode/mediawiki/tests/qunit/CodeMirror.mediawiki.test.js
@@ -83,7 +83,7 @@
 			{
 				title: 'T292967: table syntax where all | are escaped with the {{!}} parser function',
 				input: '{{{!}}\n{{!}}-\n{{!}}}',
-				output: '<pre><span><span class="cm-mw-templatevariable-bracket">{{{</span><span class="cm-mw-templatevariable-name">!}}</span></span></pre><pre><span><span class="cm-mw-templatevariable-name">{{!}}-</span></span></pre><pre><span><span class="cm-mw-templatevariable-name">{{!</span><span class="cm-mw-templatevariable-bracket">}}}</span></span></pre>'
+				output: '<pre><span><span class="cm-mw-template-ground cm-mw-template-bracket">{{</span><span class="cm-mw-template-ground cm-mw-template-name cm-mw-pagename">{!</span><span class="cm-mw-template-ground cm-mw-template-bracket">}}</span></span></pre><pre><span><span class="cm-mw-ext-ground cm-mw-parserfunction-bracket">{{</span><span class="cm-mw-ext-ground cm-mw-parserfunction-name">!</span><span class="cm-mw-ext-ground cm-mw-parserfunction-bracket">}}</span>-</span></pre><pre><span><span class="cm-mw-ext-ground cm-mw-parserfunction-bracket">{{</span><span class="cm-mw-ext-ground cm-mw-parserfunction-name">!</span><span class="cm-mw-ext-ground cm-mw-parserfunction-bracket">}}</span>}</span></pre>'
 			},
 			{
 				title: 'section headings',