diff --git a/README.Rmd b/README.Rmd
index 8426c25..079e2e3 100644
--- a/README.Rmd
+++ b/README.Rmd
@@ -78,7 +78,7 @@ By default the sequence depends on the class of the variable:
 
 These values can be overridden by setting the following options:
 
-- `new_data.length_out_lgl`, which is 2 by default, for logical vectors;
+- `new_data.length_out_lgl`, which is 2 by default, for logical vectors (values greater than 2 have no effect as a logical sequence is at most `c(FALSE, TRUE)`);
 - `new_data.length_out_dbl`, which is 30 by default, for double vectors;
 - `new_data.length_out_int`, which is 30 by default, for integer, Date, POSIXct and hms vectors^1;
 - `new_data.length_out_chr`, which is Inf by default, for character, factor and ordered vectors.
diff --git a/README.md b/README.md
index 5b11b25..5303e1a 100644
--- a/README.md
+++ b/README.md
@@ -101,7 +101,7 @@ By default the sequence depends on the class of the variable:
 
 These values can be overridden by setting the following options:
 
-- `new_data.length_out_lgl`, which is 2 by default, for logical vectors;
+- `new_data.length_out_lgl`, which is 2 by default, for logical vectors (values greater than 2 have no effect as a logical sequence is at most `c(FALSE, TRUE)`);
 - `new_data.length_out_dbl`, which is 30 by default, for double vectors;
 - `new_data.length_out_int`, which is 30 by default, for integer, Date,
   POSIXct and hms vectors^1;
diff --git a/tests/testthat/test-new-seq.R b/tests/testthat/test-new-seq.R
index cbf3972..30ca9b4 100644
--- a/tests/testthat/test-new-seq.R
+++ b/tests/testthat/test-new-seq.R
@@ -2261,3 +2261,26 @@ test_that("new_seq errors informatively for unsupported objects", {
   )
   expect_error(new_seq(list(1, 2)), "not class 'list'\\.")
 })
+
+test_that("new_seq logical .length_out greater than 2 is capped at 2", {
+  expect_identical(new_seq(c(TRUE, FALSE), .length_out = 3), c(FALSE, TRUE))
+  expect_identical(new_seq(c(TRUE, FALSE), .length_out = Inf), c(FALSE, TRUE))
+  expect_identical(
+    new_seq(c(TRUE, TRUE), .length_out = 3, .obs_only = TRUE),
+    TRUE
+  )
+  expect_identical(
+    new_seq(c(TRUE, NA, FALSE), .length_out = 3, .obs_only = TRUE),
+    c(FALSE, TRUE)
+  )
+})
+
+test_that("new_data.length_out_lgl option greater than 2 is capped at 2", {
+  withr::local_options(list(new_data.length_out_lgl = 5L))
+  expect_identical(new_seq(c(TRUE, FALSE)), c(FALSE, TRUE))
+  expect_identical(new_seq(c(TRUE, TRUE), .obs_only = TRUE), TRUE)
+  expect_identical(xnew_data(old_data, lgl)$lgl, c(FALSE, TRUE))
+
+  withr::local_options(list(new_data.length_out_lgl = Inf))
+  expect_identical(new_seq(c(TRUE, FALSE)), c(FALSE, TRUE))
+})