diff --git a/src/bin/bat/main.rs b/src/bin/bat/main.rs
index 2c6679d9..65129fa7 100644
--- a/src/bin/bat/main.rs
+++ b/src/bin/bat/main.rs
@@ -86,19 +86,6 @@ pub fn list_languages(config: &Config) -> Result<()> {
         .filter(|syntax| !syntax.hidden && !syntax.file_extensions.is_empty())
         .cloned()
         .collect::<Vec<_>>();
-
-    for lang in languages.iter_mut() {
-        let lang_name = lang.name.clone();
-        lang.file_extensions.retain(|extension| {
-            let test_file = Path::new("test").with_extension(extension);
-            match config.syntax_mapping.get_syntax_for(test_file) {
-                Some(MappingTarget::MapTo(primary_lang)) => lang_name == primary_lang,
-                Some(MappingTarget::MapToUnknown) => false,
-                None => true,
-            }
-        });
-    }
-
     languages.sort_by_key(|lang| lang.name.to_uppercase());
 
     let configured_languages = get_syntax_mapping_to_paths(config.syntax_mapping.mappings());
diff --git a/src/syntax_mapping.rs b/src/syntax_mapping.rs
index 91a0976d..0b65ae65 100644
--- a/src/syntax_mapping.rs
+++ b/src/syntax_mapping.rs
@@ -24,12 +24,6 @@ impl<'a> SyntaxMapping<'a> {
         let mut mapping = Self::empty();
         mapping.insert("*.h", MappingTarget::MapTo("C++")).unwrap();
         mapping.insert("*.fs", MappingTarget::MapTo("F#")).unwrap();
-        mapping
-            .insert("*.js", MappingTarget::MapTo("JavaScript (Babel)"))
-            .unwrap();
-        mapping
-            .insert("*.sass", MappingTarget::MapTo("Sass"))
-            .unwrap();
         mapping
             .insert("build", MappingTarget::MapToUnknown)
             .unwrap();
@@ -73,16 +67,14 @@ impl<'a> SyntaxMapping<'a> {
             "*.swap",
             "*.target",
             "*.timer",
-        ]
-        .iter()
-        {
-            mapping.insert(glob, MappingTarget::MapTo("INI")).unwrap();
+        ].iter() {
+            mapping
+                .insert(glob, MappingTarget::MapTo("INI"))
+                .unwrap();
         }
 
         // pacman hooks
-        mapping
-            .insert("*.hook", MappingTarget::MapTo("INI"))
-            .unwrap();
+        mapping.insert("*.hook", MappingTarget::MapTo("INI")).unwrap();
 
         mapping
     }
@@ -100,7 +92,7 @@ impl<'a> SyntaxMapping<'a> {
         &self.mappings
     }
 
-    pub fn get_syntax_for(&self, path: impl AsRef<Path>) -> Option<MappingTarget<'a>> {
+    pub(crate) fn get_syntax_for(&self, path: impl AsRef<Path>) -> Option<MappingTarget<'a>> {
         let candidate = Candidate::new(path.as_ref());
         let canddidate_filename = path.as_ref().file_name().map(Candidate::new);
         for (ref glob, ref syntax) in self.mappings.iter().rev() {