diff --git a/config.xsd b/config.xsd
index eb5f11e2c21..8016ac6c918 100644
--- a/config.xsd
+++ b/config.xsd
@@ -49,8 +49,8 @@
         <xs:attribute name="findUnusedBaselineEntry" type="xs:boolean" default="false" />
         <xs:attribute name="hideExternalErrors" type="xs:boolean" default="false" />
         <xs:attribute name="hoistConstants" type="xs:boolean" default="false" />
-        <xs:attribute name="ignoreInternalFunctionFalseReturn" type="xs:boolean" default="true" />
-        <xs:attribute name="ignoreInternalFunctionNullReturn" type="xs:boolean" default="true" />
+        <xs:attribute name="ignoreInternalFunctionFalseReturn" type="xs:boolean" default="false" />
+        <xs:attribute name="ignoreInternalFunctionNullReturn" type="xs:boolean" default="false" />
         <xs:attribute name="includePhpVersionsInErrorBaseline" type="xs:boolean" default="false" />
         <xs:attribute name="inferPropertyTypesFromConstructor" type="xs:boolean" default="true" />
         <xs:attribute name="memoizeMethodCallResults" type="xs:boolean" default="false" />
diff --git a/docs/running_psalm/configuration.md b/docs/running_psalm/configuration.md
index f4976aaad83..05f65236f0c 100644
--- a/docs/running_psalm/configuration.md
+++ b/docs/running_psalm/configuration.md
@@ -213,7 +213,7 @@ When `true`, Psalm will check that the developer has caught every exception in g
   ignoreInternalFunctionFalseReturn="[bool]"
 >
 ```
-When `true`, Psalm ignores possibly-false issues stemming from return values of internal functions (like `preg_split`) that may return false, but do so rarely. Defaults to `true`.
+When `true`, Psalm ignores possibly-false issues stemming from return values of internal functions (like `preg_split`) that may return false, but do so rarely. Defaults to `false`.
 
 #### ignoreInternalFunctionNullReturn
 
@@ -222,7 +222,7 @@ When `true`, Psalm ignores possibly-false issues stemming from return values of
   ignoreInternalFunctionNullReturn="[bool]"
 >
 ```
-When `true`, Psalm ignores possibly-null issues stemming from return values of internal array functions (like `current`) that may return null, but do so rarely. Defaults to `true`.
+When `true`, Psalm ignores possibly-null issues stemming from return values of internal array functions (like `current`) that may return null, but do so rarely. Defaults to `false`.
 
 #### inferPropertyTypesFromConstructor
 
diff --git a/src/Psalm/Config.php b/src/Psalm/Config.php
index 4ed53897532..2a99becb520 100644
--- a/src/Psalm/Config.php
+++ b/src/Psalm/Config.php
@@ -401,12 +401,12 @@ class Config
     /**
      * @var bool
      */
-    public $ignore_internal_falsable_issues = true;
+    public $ignore_internal_falsable_issues = false;
 
     /**
      * @var bool
      */
-    public $ignore_internal_nullable_issues = true;
+    public $ignore_internal_nullable_issues = false;
 
     /**
      * @var array<string, bool>