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Unnecessary use of double quotes in string

Reports double-quoted strings that can be converted to single-quoted. Any string that doesn't contain any expression substitutions, or special symbols may be converted.


# Bad practice "Hello world" "Hello \"John Doe\""

A quick-fix to convert a double-quoted string is available. After the quick-fix is applied, the result looks like this:

# Good practice 'Hello world' 'Hello "John Doe"' "Hello 'John Doe'"

Use the Ignore strings containing single quotes checkbox to ignore strings that require escaping.

Inspired by 'RuboCop'

Locating this inspection


Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.

Via Settings dialog

Path to the inspection settings via IntelliJ Platform IDE Settings dialog, when you need to adjust inspection settings directly from your IDE.

Settings or Preferences | Editor | Inspections | Ruby | Code style issues

Inspection options

Here you can find the description of settings available for the Unnecessary use of double quotes in string inspection, and the reference of their default values.

Ignore strings containing single quotes

Not selected


By default bundled with

Qodana for Ruby 2024.1, RubyMine 2024.1,

Can be installed with plugin

Ruby, 241.SNAPSHOT

Last modified: 18 June 2024