diff --git a/src/plugins/python/pythonconstants.h b/src/plugins/python/pythonconstants.h
index 330f073ebcb..76f4ca2bb52 100644
--- a/src/plugins/python/pythonconstants.h
+++ b/src/plugins/python/pythonconstants.h
@@ -49,6 +49,7 @@ const char PYLS_SETTINGS_ID[] = "Python.PyLSSettingsID";
  * MIME type
  ******************************************************************************/
 const char C_PY_MIMETYPE[] = "text/x-python";
+const char C_PY3_MIMETYPE[] = "text/x-python3";
 const char C_PY_MIME_ICON[] = "text-x-python";
 
 } // namespace Constants
diff --git a/src/plugins/python/pythonlanguageclient.cpp b/src/plugins/python/pythonlanguageclient.cpp
index 9479fc0c1a1..ddab091bf67 100644
--- a/src/plugins/python/pythonlanguageclient.cpp
+++ b/src/plugins/python/pythonlanguageclient.cpp
@@ -389,7 +389,8 @@ PyLSSettings::PyLSSettings()
     m_settingsTypeId = Constants::PYLS_SETTINGS_ID;
     m_name = "Python Language Server";
     m_startBehavior = RequiresFile;
-    m_languageFilter.mimeTypes = QStringList(Constants::C_PY_MIMETYPE);
+    m_languageFilter.mimeTypes = QStringList()
+                                 << Constants::C_PY_MIMETYPE << Constants::C_PY3_MIMETYPE;
     m_arguments = "-m pylsp";
     const QJsonDocument config(defaultConfiguration());
     m_configuration = QString::fromUtf8(config.toJson());
@@ -416,6 +417,8 @@ void PyLSSettings::fromMap(const QVariantMap &map)
         const QJsonDocument config(defaultConfiguration());
         m_configuration = QString::fromUtf8(config.toJson());
     }
+    m_languageFilter.mimeTypes = QStringList()
+                                 << Constants::C_PY_MIMETYPE << Constants::C_PY3_MIMETYPE;
     setInterpreter(map[interpreterKey].toString());
 }
 
@@ -640,7 +643,8 @@ static Client *registerLanguageServer(const FilePath &python)
         auto *settings = new StdIOSettings();
         settings->m_executable = python;
         settings->m_arguments = "-m pylsp";
-        settings->m_languageFilter.mimeTypes = QStringList(Constants::C_PY_MIMETYPE);
+        settings->m_languageFilter.mimeTypes = QStringList() << Constants::C_PY_MIMETYPE
+                                                             << Constants::C_PY3_MIMETYPE;
     }
     settings->m_name = PyLSConfigureAssistant::tr("Python Language Server (%1)")
                            .arg(pythonName(python));
diff --git a/src/plugins/python/pythonrunconfiguration.cpp b/src/plugins/python/pythonrunconfiguration.cpp
index fe4623dd8de..c88bbb26629 100644
--- a/src/plugins/python/pythonrunconfiguration.cpp
+++ b/src/plugins/python/pythonrunconfiguration.cpp
@@ -236,7 +236,8 @@ void PythonRunConfiguration::currentInterpreterChanged()
 
     for (FilePath &file : project()->files(Project::AllFiles)) {
         if (auto document = TextEditor::TextDocument::textDocumentForFilePath(file)) {
-            if (document->mimeType() == Constants::C_PY_MIMETYPE) {
+            if (document->mimeType() == Constants::C_PY_MIMETYPE
+                || document->mimeType() == Constants::C_PY3_MIMETYPE) {
                 PyLSConfigureAssistant::openDocumentWithPython(python, document);
                 PySideInstaller::checkPySideInstallation(python, document);
             }