diff --git a/R/tm_g_lineplot.R b/R/tm_g_lineplot.R
index d2e46351b..833f99c77 100644
--- a/R/tm_g_lineplot.R
+++ b/R/tm_g_lineplot.R
@@ -5,6 +5,7 @@
 #' @inheritParams tern::g_lineplot
 #' @inheritParams tern::control_lineplot_vars
 #' @inheritParams template_arguments
+#' @param strata `r lifecycle::badge("deprecated")` Please use the `group_var` argument instead.
 #' @param group_var (`string` or `NA`)\cr group variable name.
 #' @param param (`character`)\cr parameter to filter the data by.
 #' @param incl_screen (`logical`)\cr whether the screening visit should be included.
@@ -22,6 +23,7 @@
 #'
 #' @keywords internal
 template_g_lineplot <- function(dataname = "ANL",
+                                strata = lifecycle::deprecated(),
                                 group_var = "ARM",
                                 x = "AVISIT",
                                 y = "AVAL",
@@ -40,6 +42,15 @@ template_g_lineplot <- function(dataname = "ANL",
                                 title = "Line Plot",
                                 y_lab = "",
                                 ggplot2_args = teal.widgets::ggplot2_args()) {
+  if (lifecycle::is_present(strata)) {
+    warning(
+      "The `strata` argument of `tm_g_lineplot()` is deprecated as of teal.modules.clinical 0.9.1. ",
+      "Please use the `group_var` argument instead.",
+      call. = FALSE
+    )
+    group_var <- strata
+  }
+
   checkmate::assert_string(dataname)
   checkmate::assert_string(group_var)
   checkmate::assert_string(x)
@@ -255,11 +266,8 @@ template_g_lineplot <- function(dataname = "ANL",
 #' @export
 tm_g_lineplot <- function(label,
                           dataname,
-                          parentname = ifelse(
-                            inherits(group_var, "data_extract_spec"),
-                            teal.transform::datanames_input(group_var),
-                            "ADSL"
-                          ),
+                          parentname = NULL,
+                          strata = lifecycle::deprecated(),
                           group_var = teal.transform::choices_selected(
                             teal.transform::variable_choices(parentname, c("ARM", "ARMCD", "ACTARMCD")), "ARM"
                           ),
@@ -294,6 +302,21 @@ tm_g_lineplot <- function(label,
                           pre_output = NULL,
                           post_output = NULL,
                           ggplot2_args = teal.widgets::ggplot2_args()) {
+  if (lifecycle::is_present(strata)) {
+    warning(
+      "The `strata` argument of `tm_g_lineplot()` is deprecated as of teal.modules.clinical 0.9.1. ",
+      "Please use the `group_var` argument instead.",
+      call. = FALSE
+    )
+    group_var <- strata
+  }
+
+  # Now handle 'parentname' calculation based on 'group_var'
+  parentname <- ifelse(
+    inherits(group_var, "data_extract_spec"),
+    teal.transform::datanames_input(group_var),
+    "ADSL"
+  )
   message("Initializing tm_g_lineplot")
   checkmate::assert_string(label)
   checkmate::assert_string(dataname)
diff --git a/man/template_g_lineplot.Rd b/man/template_g_lineplot.Rd
index 8eb9e581c..f1941082f 100644
--- a/man/template_g_lineplot.Rd
+++ b/man/template_g_lineplot.Rd
@@ -6,6 +6,7 @@
 \usage{
 template_g_lineplot(
   dataname = "ANL",
+  strata = lifecycle::deprecated(),
   group_var = "ARM",
   x = "AVISIT",
   y = "AVAL",
@@ -29,6 +30,8 @@ template_g_lineplot(
 \arguments{
 \item{dataname}{(\code{character})\cr analysis data used in teal module.}
 
+\item{strata}{\ifelse{html}{\href{https://lifecycle.r-lib.org/articles/stages.html#deprecated}{\figure{lifecycle-deprecated.svg}{options: alt='[Deprecated]'}}}{\strong{[Deprecated]}} Please use the \code{group_var} argument instead.}
+
 \item{group_var}{(\code{string} or \code{NA})\cr group variable name.}
 
 \item{x}{(\code{string})\cr x-variable name.}
diff --git a/man/tm_g_lineplot.Rd b/man/tm_g_lineplot.Rd
index 07b429777..84504eb8d 100644
--- a/man/tm_g_lineplot.Rd
+++ b/man/tm_g_lineplot.Rd
@@ -7,8 +7,8 @@
 tm_g_lineplot(
   label,
   dataname,
-  parentname = ifelse(inherits(group_var, "data_extract_spec"),
-    teal.transform::datanames_input(group_var), "ADSL"),
+  parentname = NULL,
+  strata = lifecycle::deprecated(),
   group_var =
     teal.transform::choices_selected(teal.transform::variable_choices(parentname,
     c("ARM", "ARMCD", "ACTARMCD")), "ARM"),
@@ -45,6 +45,8 @@ tm_g_lineplot(
 
 \item{parentname}{(\code{character})\cr parent analysis data used in teal module, usually this refers to \code{ADSL}.}
 
+\item{strata}{\ifelse{html}{\href{https://lifecycle.r-lib.org/articles/stages.html#deprecated}{\figure{lifecycle-deprecated.svg}{options: alt='[Deprecated]'}}}{\strong{[Deprecated]}} Please use the \code{group_var} argument instead.}
+
 \item{group_var}{(\code{string} or \code{NA})\cr group variable name.}
 
 \item{x}{(\code{string})\cr x-variable name.}