diff --git a/compiler/testData/cli/jvm/help.out b/compiler/testData/cli/jvm/help.out
index e044380e11a..19c7d1240d0 100644
--- a/compiler/testData/cli/jvm/help.out
+++ b/compiler/testData/cli/jvm/help.out
@@ -7,7 +7,7 @@ Usage: org.jetbrains.jet.cli.common.arguments.K2JVMCompilerArguments
   -noJdk [flag] don't include Java runtime into classpath
   -noStdlib [flag] don't include Kotlin runtime into classpath
   -noJdkAnnotations [flag] don't include JDK external annotations into classpath
-  -notNullAssertions [flag] generate not-null assertion after each invokation of method returning not-null
+  -notNullAssertions [flag] generate not-null assertion after each invocation of method returning not-null
   -notNullParamAssertions [flag] generate not-null assertions on parameters of methods accessible from Java
   -output [String] output directory
   -module [String] module to compile
diff --git a/compiler/testData/cli/jvm/inline/off.out b/compiler/testData/cli/jvm/inline/off.out
index e044380e11a..19c7d1240d0 100644
--- a/compiler/testData/cli/jvm/inline/off.out
+++ b/compiler/testData/cli/jvm/inline/off.out
@@ -7,7 +7,7 @@ Usage: org.jetbrains.jet.cli.common.arguments.K2JVMCompilerArguments
   -noJdk [flag] don't include Java runtime into classpath
   -noStdlib [flag] don't include Kotlin runtime into classpath
   -noJdkAnnotations [flag] don't include JDK external annotations into classpath
-  -notNullAssertions [flag] generate not-null assertion after each invokation of method returning not-null
+  -notNullAssertions [flag] generate not-null assertion after each invocation of method returning not-null
   -notNullParamAssertions [flag] generate not-null assertions on parameters of methods accessible from Java
   -output [String] output directory
   -module [String] module to compile
diff --git a/compiler/testData/cli/jvm/inline/on.out b/compiler/testData/cli/jvm/inline/on.out
index e044380e11a..19c7d1240d0 100644
--- a/compiler/testData/cli/jvm/inline/on.out
+++ b/compiler/testData/cli/jvm/inline/on.out
@@ -7,7 +7,7 @@ Usage: org.jetbrains.jet.cli.common.arguments.K2JVMCompilerArguments
   -noJdk [flag] don't include Java runtime into classpath
   -noStdlib [flag] don't include Kotlin runtime into classpath
   -noJdkAnnotations [flag] don't include JDK external annotations into classpath
-  -notNullAssertions [flag] generate not-null assertion after each invokation of method returning not-null
+  -notNullAssertions [flag] generate not-null assertion after each invocation of method returning not-null
   -notNullParamAssertions [flag] generate not-null assertions on parameters of methods accessible from Java
   -output [String] output directory
   -module [String] module to compile
diff --git a/compiler/testData/cli/jvm/inline/wrong.out b/compiler/testData/cli/jvm/inline/wrong.out
index 8c738d0c1d8..958c602f282 100644
--- a/compiler/testData/cli/jvm/inline/wrong.out
+++ b/compiler/testData/cli/jvm/inline/wrong.out
@@ -8,7 +8,7 @@ Usage: org.jetbrains.jet.cli.common.arguments.K2JVMCompilerArguments
   -noJdk [flag] don't include Java runtime into classpath
   -noStdlib [flag] don't include Kotlin runtime into classpath
   -noJdkAnnotations [flag] don't include JDK external annotations into classpath
-  -notNullAssertions [flag] generate not-null assertion after each invokation of method returning not-null
+  -notNullAssertions [flag] generate not-null assertion after each invocation of method returning not-null
   -notNullParamAssertions [flag] generate not-null assertions on parameters of methods accessible from Java
   -output [String] output directory
   -module [String] module to compile
diff --git a/compiler/testData/cli/jvm/wrongArgument.out b/compiler/testData/cli/jvm/wrongArgument.out
index 08bb55431b4..62df4537c91 100644
--- a/compiler/testData/cli/jvm/wrongArgument.out
+++ b/compiler/testData/cli/jvm/wrongArgument.out
@@ -8,7 +8,7 @@ Usage: org.jetbrains.jet.cli.common.arguments.K2JVMCompilerArguments
   -noJdk [flag] don't include Java runtime into classpath
   -noStdlib [flag] don't include Kotlin runtime into classpath
   -noJdkAnnotations [flag] don't include JDK external annotations into classpath
-  -notNullAssertions [flag] generate not-null assertion after each invokation of method returning not-null
+  -notNullAssertions [flag] generate not-null assertion after each invocation of method returning not-null
   -notNullParamAssertions [flag] generate not-null assertions on parameters of methods accessible from Java
   -output [String] output directory
   -module [String] module to compile