diff --git a/R/align-.R b/R/align-.R
index b1e4a60c..7e8c1dfd 100644
--- a/R/align-.R
+++ b/R/align-.R
@@ -1,6 +1,6 @@
-#' Create a New `Align` Object
+#' Create a New `align` Object
 #'
-#' `r lifecycle::badge('experimental')` An `Align` object interacts with the
+#' `r lifecycle::badge('experimental')` An `align` object interacts with the
 #' `layout` object to reorder or split observations and, in some cases, add plot
 #' components to the `layout`.
 #'
@@ -56,7 +56,7 @@
 #'  - [`stack_layout()`]: The layout matrix is used as is, aligning all plots
 #'    along a single axis.
 #'
-#' @return A new `Align` object.
+#' @return A new `align` object.
 #'
 #' @examples
 #' align_gg()
diff --git a/R/align-add.R b/R/align-add.R
index 0c771657..72c8abaf 100644
--- a/R/align-add.R
+++ b/R/align-add.R
@@ -1,5 +1,5 @@
 ####################################################################
-# Following methods are used to add elements to `Align` object
+# Following methods are used to add elements to `align` object
 align_add <- function(object, align, object_name) UseMethod("align_add")
 
 #' @importFrom ggplot2 ggplot_add
diff --git a/man/align.Rd b/man/align.Rd
index 153b12ef..73c1d884 100644
--- a/man/align.Rd
+++ b/man/align.Rd
@@ -4,7 +4,7 @@
 \name{align}
 \alias{align}
 \alias{Align}
-\title{Create a New \code{Align} Object}
+\title{Create a New \code{align} Object}
 \usage{
 align(
   align_class,
@@ -83,10 +83,10 @@ warnings as necessary.}
 messages.}
 }
 \value{
-A new \code{Align} object.
+A new \code{align} object.
 }
 \description{
-\ifelse{html}{\href{https://lifecycle.r-lib.org/articles/stages.html#experimental}{\figure{lifecycle-experimental.svg}{options: alt='[Experimental]'}}}{\strong{[Experimental]}} An \code{Align} object interacts with the
+\ifelse{html}{\href{https://lifecycle.r-lib.org/articles/stages.html#experimental}{\figure{lifecycle-experimental.svg}{options: alt='[Experimental]'}}}{\strong{[Experimental]}} An \code{align} object interacts with the
 \code{layout} object to reorder or split observations and, in some cases, add plot
 components to the \code{layout}.
 }
diff --git a/tests/testthat/test-layout_quad.R b/tests/testthat/test-layout_quad.R
index 46295c18..03bb0cb3 100644
--- a/tests/testthat/test-layout_quad.R
+++ b/tests/testthat/test-layout_quad.R
@@ -129,7 +129,7 @@ testthat::test_that("add `anno_init()` works well", {
     expect_no_error(quad_alignb(small_mat) + anno_init("l", small_mat))
 })
 
-testthat::test_that("add `Align` object works well", {
+testthat::test_that("add `align` object works well", {
     set.seed(1L)
     small_mat <- matrix(rnorm(72), nrow = 8)
     rownames(small_mat) <- paste0("row", seq_len(nrow(small_mat)))
@@ -152,7 +152,7 @@ testthat::test_that("add `Align` object works well", {
 
     # quad_alignh()
     # for vertical direction, we must manually provide the data frame
-    # we cannot add `Align` object in top and bottom
+    # we cannot add `align` object in top and bottom
     expect_error(quad_alignh(small_mat) +
         anno_init("t", mtcars) +
         align_dendro())
@@ -170,7 +170,7 @@ testthat::test_that("add `Align` object works well", {
 
     # quad_alignv()
     # for horizontal direction, we must manually provide the data frame
-    # we cannot add `Align` object in left and right
+    # we cannot add `align` object in left and right
     expect_error(quad_alignv(small_mat) +
         anno_init("l", mtcars) +
         align_dendro())
diff --git a/tests/testthat/test-layout_stack.R b/tests/testthat/test-layout_stack.R
index 0e7654d2..4b31e1fc 100644
--- a/tests/testthat/test-layout_stack.R
+++ b/tests/testthat/test-layout_stack.R
@@ -36,7 +36,7 @@ testthat::test_that("`stack_free` works well", {
     expect_identical(x@layout, NULL)
 })
 
-testthat::test_that("`stack_align` add `Align` object", {
+testthat::test_that("`stack_align` add `align` object", {
     set.seed(1L)
     small_mat <- matrix(rnorm(72), nrow = 8)
     rownames(small_mat) <- paste0("row", seq_len(nrow(small_mat)))