diff --git a/examples/psalm.default.xml b/examples/psalm.default.xml
index 0d770bdcc..01bfdac2e 100644
--- a/examples/psalm.default.xml
+++ b/examples/psalm.default.xml
@@ -3,21 +3,13 @@
     name="Example Psalm config with recommended defaults"
     stopOnFirstError="false"
     useDocblockTypes="true"
+    totallyTyped="false"
 >
     <inspectFiles>
         <directory name="src" />
     </inspectFiles>
 
     <issueHandler>
-        <MixedArrayAccess errorLevel="suppress" />
-        <MixedArrayOffset errorLevel="suppress" />
-        <MixedAssignment errorLevel="suppress" />
-        <MixedArgument errorLevel="suppress" />
-        <MixedMethodCall errorLevel="suppress" />
-        <MixedPropertyFetch errorLevel="suppress" />
-        <MixedPropertyAssignment errorLevel="suppress" />
-        <MixedInferredReturnType errorLevel="suppress" />
-
         <InvalidDocblock errorLevel="info" />
         <MissingPropertyType errorLevel="info" />
         <MissingReturnType errorLevel="info" />
diff --git a/psalm.xml b/psalm.xml
index 328be4a12..3d1e640be 100644
--- a/psalm.xml
+++ b/psalm.xml
@@ -3,6 +3,7 @@
     name="Psalm for Psalm"
     stopOnFirstError="false"
     useDocblockTypes="true"
+    totallyTyped="true"
 >
     <inspectFiles>
         <directory name="src" />
diff --git a/src/Psalm/Config.php b/src/Psalm/Config.php
index 4c4899177..94ecc3cff 100644
--- a/src/Psalm/Config.php
+++ b/src/Psalm/Config.php
@@ -22,6 +22,21 @@ class Config
         self::REPORT_SUPPRESS
     ];
 
+    /**
+     * @var array
+     */
+    protected static $MIXED_ISSUES = [
+        'MixedArgument',
+        'MixedArrayAccess',
+        'MixedArrayOffset',
+        'MixedAssignment',
+        'MixedInferredReturnType',
+        'MixedMethodCall',
+        'MixedPropertyFetch',
+        'MixedPropertyAssignment',
+        'MixedStringOffsetAssignment'
+    ];
+
     /**
      * @var self|null
      */
@@ -114,6 +129,9 @@ class Config
     /** @var bool */
     public $allow_includes = true;
 
+    /** @var bool */
+    public $totally_typed = false;
+
     /**
      * Psalm plugins
      *
@@ -195,6 +213,11 @@ class Config
             $config->allow_includes = $attribute_text === 'true' || $attribute_text === '1';
         }
 
+        if (isset($config_xml['totallyTyped'])) {
+            $attribute_text = (string) $config_xml['totallyTyped'];
+            $config->totally_typed = $attribute_text === 'true' || $attribute_text === '1';
+        }
+
         if (isset($config_xml->inspectFiles)) {
             $config->inspect_files = FileFilter::loadFromXML($config_xml->inspectFiles, true);
         }
@@ -349,6 +372,10 @@ class Config
      */
     public function excludeIssueInFile($issue_type, $file_name)
     {
+        if (!$this->totally_typed && in_array($issue_type, self::$MIXED_ISSUES)) {
+            return true;
+        }
+
         if ($this->getReportingLevel($issue_type) === self::REPORT_SUPPRESS) {
             return true;
         }
diff --git a/tests/TestConfig.php b/tests/TestConfig.php
index 61e73fdb0..ad31d123d 100644
--- a/tests/TestConfig.php
+++ b/tests/TestConfig.php
@@ -11,5 +11,6 @@ class TestConfig extends Config
 
         $this->throw_exception = true;
         $this->use_docblock_types = true;
+        $this->totally_typed = true;
     }
 }