diff --git a/ChangeLog.md b/ChangeLog.md
index 295403ec58d..86e1c6cda60 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -196,6 +196,7 @@ These artifacts include extensions for the types available in the latter JDKs, s
 #### Formatter
 
 - [`KT-12830`](https://youtrack.jetbrains.com/issue/KT-12830) Remove spaces before *?* in nullable types
+- [`KT-13314`](https://youtrack.jetbrains.com/issue/KT-13314) Format spaces around !is and !in
 
 #### Intention actions, inspections and quickfixes
 
diff --git a/idea/formatter/src/org/jetbrains/kotlin/idea/formatter/kotlinSpacingRules.kt b/idea/formatter/src/org/jetbrains/kotlin/idea/formatter/kotlinSpacingRules.kt
index 311597bce6e..4f19a7a7936 100644
--- a/idea/formatter/src/org/jetbrains/kotlin/idea/formatter/kotlinSpacingRules.kt
+++ b/idea/formatter/src/org/jetbrains/kotlin/idea/formatter/kotlinSpacingRules.kt
@@ -167,7 +167,9 @@ fun createSpacingBuilder(settings: CodeStyleSettings, builderUtil: KotlinSpacing
 
             around(AS_KEYWORD).spaces(1)
             around(IS_KEYWORD).spaces(1)
+            around(NOT_IS).spaces(1)
             around(IN_KEYWORD).spaces(1)
+            around(NOT_IN).spaces(1)
             aroundInside(IDENTIFIER, BINARY_EXPRESSION).spaces(1)
 
             // before LPAR in constructor(): this() {}
diff --git a/idea/testData/formatter/NotIn.after.kt b/idea/testData/formatter/NotIn.after.kt
new file mode 100644
index 00000000000..5cd22d0952a
--- /dev/null
+++ b/idea/testData/formatter/NotIn.after.kt
@@ -0,0 +1,5 @@
+fun f() {
+    if (1 !in intArrayOf()) {
+
+    }
+}
\ No newline at end of file
diff --git a/idea/testData/formatter/NotIn.kt b/idea/testData/formatter/NotIn.kt
new file mode 100644
index 00000000000..224c0cd9faa
--- /dev/null
+++ b/idea/testData/formatter/NotIn.kt
@@ -0,0 +1,5 @@
+fun f() {
+    if (1   !in   intArrayOf()) {
+
+    }
+}
\ No newline at end of file
diff --git a/idea/testData/formatter/NotIs.after.kt b/idea/testData/formatter/NotIs.after.kt
new file mode 100644
index 00000000000..d0e0c2d3b26
--- /dev/null
+++ b/idea/testData/formatter/NotIs.after.kt
@@ -0,0 +1,5 @@
+fun f() {
+    if (1 !is Int) {
+
+    }
+}
\ No newline at end of file
diff --git a/idea/testData/formatter/NotIs.kt b/idea/testData/formatter/NotIs.kt
new file mode 100644
index 00000000000..893cef99561
--- /dev/null
+++ b/idea/testData/formatter/NotIs.kt
@@ -0,0 +1,5 @@
+fun f() {
+    if (1   !is  Int) {
+
+    }
+}
\ No newline at end of file
diff --git a/idea/tests/org/jetbrains/kotlin/formatter/FormatterTestGenerated.java b/idea/tests/org/jetbrains/kotlin/formatter/FormatterTestGenerated.java
index f5cda8f3bf3..4e0d507980b 100644
--- a/idea/tests/org/jetbrains/kotlin/formatter/FormatterTestGenerated.java
+++ b/idea/tests/org/jetbrains/kotlin/formatter/FormatterTestGenerated.java
@@ -433,6 +433,18 @@ public class FormatterTestGenerated extends AbstractFormatterTest {
             doTest(fileName);
         }
 
+        @TestMetadata("NotIn.after.kt")
+        public void testNotIn() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/formatter/NotIn.after.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("NotIs.after.kt")
+        public void testNotIs() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/formatter/NotIs.after.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("NullableType.after.kt")
         public void testNullableType() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("idea/testData/formatter/NullableType.after.kt");