.input-group {
    &:not(.has-validation) {
        > :not(:last-child):not(.dropdown-toggle):not(.dropdown-menu) {
            &.select2-container--default {
                .select2-selection {
                    @include border-end-radius(0);
                }
            }
        }
    }

    &.has-validation {
        > :nth-last-child(n + 3):not(.dropdown-toggle):not(.dropdown-menu) {
            &.select2-container--default {
                .select2-selection {
                    @include border-end-radius(0);
                }
            }
        }
    }

    > .input-group-text ~ .select2-container--default,
    > .btn ~ .select2-container--default,
    > .dropdown-menu ~ .select2-container--default {
        .select2-selection {
            @include border-start-radius(0);
        }
    }

    .select2-container--default {
        flex-grow: 1;
        .select2-selection {
            height: 100%;
        }
    }
}