diff --git a/tests/testthat/test-independent-testing-collect_n_subject.R b/tests/testthat/test-independent-testing-collect_n_subject.R
index dbcb65f..185920d 100644
--- a/tests/testthat/test-independent-testing-collect_n_subject.R
+++ b/tests/testthat/test-independent-testing-collect_n_subject.R
@@ -1,5 +1,3 @@
-library(r2rtf)
-
 test_that("test n_subject can calculate number of records by group in diffrent `use_na` situation", {
   df1 <- data.frame(
     id = c(1, 2, 3, 4, 5, 6, 7),
diff --git a/tests/testthat/test-independent-testing-meta_adam.R b/tests/testthat/test-independent-testing-meta_adam.R
index be520c0..9cc1bdf 100644
--- a/tests/testthat/test-independent-testing-meta_adam.R
+++ b/tests/testthat/test-independent-testing-meta_adam.R
@@ -1,6 +1,3 @@
-library(r2rtf)
-
-
 test_that("meta_adam testing", {
   test <- meta_adam(
     population = r2rtf::r2rtf_adsl,
diff --git a/tests/testthat/test-independent-testing-meta_add_total.R b/tests/testthat/test-independent-testing-meta_add_total.R
index 70c0a8c..daa126a 100644
--- a/tests/testthat/test-independent-testing-meta_add_total.R
+++ b/tests/testthat/test-independent-testing-meta_add_total.R
@@ -1,16 +1,12 @@
-library(testthat)
-library(dplyr)
-
 test_that("Multple names for total column has to throw error", {
   expect_error(meta_add_total(meta = meta_example(), total = c("Total", "Sum")))
 })
 
-
 test_that("number of distinct treatment arms after adding", {
   x <- meta_add_total(meta = meta_example(), total = "Sum")
   y <- meta_example()
-  expect_equal(n_distinct(x$data_population$TRTA), n_distinct(y$data_population$TRTA) + 1)
-  expect_equal(n_distinct(x$data_observation$TRTA), n_distinct(y$data_observation$TRTA) + 1)
+  expect_equal(dplyr::n_distinct(x$data_population$TRTA), dplyr::n_distinct(y$data_population$TRTA) + 1)
+  expect_equal(dplyr::n_distinct(x$data_observation$TRTA), dplyr::n_distinct(y$data_observation$TRTA) + 1)
   expect_true("Sum" %in% x$data_observation$TRTA)
   expect_false("Sum" %in% y$data_observation$TRTA)
   expect_true("Sum" %in% x$data_population$TRTA)
diff --git a/tests/testthat/test-independent-testing-meta_split.R b/tests/testthat/test-independent-testing-meta_split.R
index 76f0753..77e2846 100644
--- a/tests/testthat/test-independent-testing-meta_split.R
+++ b/tests/testthat/test-independent-testing-meta_split.R
@@ -1,5 +1,3 @@
-library(dplyr)
-
 test_that("variable 'RACE' checking", {
   expect_equal(names(meta_example() |> meta_split("RACE")), sort(unique(meta_example()$data_population$RACE)))
 })
@@ -7,41 +5,41 @@ test_that("variable 'RACE' checking", {
 
 test_that("variable 'RACE = WHITE' checking in data_population", {
   x <- meta_example() |> meta_split("RACE")
-  z <- meta_example()$data_population %>% filter(RACE == "WHITE")
+  z <- meta_example()$data_population %>% dplyr::filter(RACE == "WHITE")
   expect_equal(x$WHITE$data_population$USUBJID, unlist(as.list(z$USUBJID)))
 })
 
 
 test_that("variable 'RACE = BLACK OR AFRICAN AMERICAN' checking in data_population", {
   x <- meta_example() |> meta_split("RACE")
-  z <- meta_example()$data_population %>% filter(RACE == "BLACK OR AFRICAN AMERICAN")
+  z <- meta_example()$data_population %>% dplyr::filter(RACE == "BLACK OR AFRICAN AMERICAN")
   expect_equal(x$`BLACK OR AFRICAN AMERICAN`$data_population$USUBJID, unlist(as.list(z$USUBJID)))
 })
 
 
 test_that("variable 'RACE = AMERICAN INDIAN OR ALASKA NATIVE' checking in data_population", {
   x <- meta_example() |> meta_split("RACE")
-  z <- meta_example()$data_population %>% filter(RACE == "AMERICAN INDIAN OR ALASKA NATIVE")
+  z <- meta_example()$data_population %>% dplyr::filter(RACE == "AMERICAN INDIAN OR ALASKA NATIVE")
   expect_equal(x$`AMERICAN INDIAN OR ALASKA NATIVE`$data_population$USUBJID, unlist(as.list(z$USUBJID)))
 })
 
 
 test_that("variable 'RACE = WHITE' checking in data_observation", {
   x <- meta_example() |> meta_split("RACE")
-  z <- meta_example()$data_observation %>% filter(RACE == "WHITE")
+  z <- meta_example()$data_observation %>% dplyr::filter(RACE == "WHITE")
   expect_equal(x$WHITE$data_observation$USUBJID, unlist(as.list(z$USUBJID)))
 })
 
 
 test_that("variable 'RACE = BLACK OR AFRICAN AMERICAN' checking in data_observation", {
   x <- meta_example() |> meta_split("RACE")
-  z <- meta_example()$data_observation %>% filter(RACE == "BLACK OR AFRICAN AMERICAN")
+  z <- meta_example()$data_observation %>% dplyr::filter(RACE == "BLACK OR AFRICAN AMERICAN")
   expect_equal(x$`BLACK OR AFRICAN AMERICAN`$data_observation$USUBJID, unlist(as.list(z$USUBJID)))
 })
 
 
 test_that("variable 'RACE = AMERICAN INDIAN OR ALASKA NATIVE' checking in data_observation", {
   x <- meta_example() |> meta_split("RACE")
-  z <- meta_example()$data_observation %>% filter(RACE == "AMERICAN INDIAN OR ALASKA NATIVE")
+  z <- meta_example()$data_observation %>% dplyr::filter(RACE == "AMERICAN INDIAN OR ALASKA NATIVE")
   expect_equal(x$`AMERICAN INDIAN OR ALASKA NATIVE`$data_observation$USUBJID, unlist(as.list(z$USUBJID)))
 })
diff --git a/tests/testthat/test-independent-testing-outdata.R b/tests/testthat/test-independent-testing-outdata.R
index 5ad62cb..0126fc1 100644
--- a/tests/testthat/test-independent-testing-outdata.R
+++ b/tests/testthat/test-independent-testing-outdata.R
@@ -1,9 +1,6 @@
-library(dplyr)
-library(metalite)
-
 test_that("Its class is 'outdata'", {
   meta <- meta_example()
-  output <- outdata(meta_example(), "apat", "wk12", "rel", n = meta$data_population %>% group_by(TRTA) %>% summarize(n = n()), group = "TRTA", reference_group = 1, order = 1:3)
+  output <- outdata(meta_example(), "apat", "wk12", "rel", n = meta$data_population %>% dplyr::group_by(TRTA) %>% dplyr::summarize(n = dplyr::n()), group = "TRTA", reference_group = 1, order = 1:3)
 
   expect_equal(class(output), "outdata")
   expect_equal(length(output), 8)
@@ -17,7 +14,7 @@ test_that("Expecting an error", {
 
 test_that("Its class is 'outdata'", {
   meta <- meta_example()
-  x <- list(meta = meta_example(), population = "apat", observation = "wk12", parameter = "rel", n = meta$data_population %>% group_by(TRTA) %>% summarize(n = n()), group = "TRTA", reference_group = 1, order = 1:3)
+  x <- list(meta = meta_example(), population = "apat", observation = "wk12", parameter = "rel", n = meta$data_population %>% dplyr::group_by(TRTA) %>% dplyr::summarize(n = dplyr::n()), group = "TRTA", reference_group = 1, order = 1:3)
   output <- metalite:::new_outdata(x)
   expect_equal(class(output), "outdata")
 })
@@ -27,14 +24,9 @@ test_that("Expecting an error", {
 
   meta <- meta_example()
 
-  expect_error(metalite:::validate_outdata(outdata(meta = meta_example(), population = "apat", observation = "wk12", parameter = "rel", n = meta$data_population %>% group_by(TRTA) %>% summarize(n = n()), group = "TRTA", reference_group = "Placebo", order = 1:3)))
-
-
-  expect_error(metalite:::validate_outdata(outdata(meta = meta_example(), population = "apat", observation = "wk12", parameter = "rel", n = meta$data_population %>% group_by(TRTA) %>% summarize(n = n()), group = "TRTA", reference_group = 1, order = c("Placebo", "Xanomeline Low Dose", "Xanomeline High Dose"))))
-
-  expect_error(metalite:::validate_outdata(outdata(meta = meta_example(), population = 1, observation = "wk12", parameter = "rel", n = meta$data_population %>% group_by(TRTA) %>% summarize(n = n()), group = "TRTA", reference_group = 1, order = 1:3)))
-
-  expect_error(metalite:::validate_outdata(outdata(meta = meta_example(), population = "apat", observation = "wk12", parameter = "rel", n = meta$data_population %>% group_by(TRTA) %>% summarize(n = n()), group = "TRTA", reference_group = 1:2, order = 1:3)))
-
-  expect_error(metalite:::validate_outdata(outdata(meta = meta_example(), population = c("apat", "ITT"), observation = "wk12", parameter = "rel", n = meta$data_population %>% group_by(TRTA) %>% summarize(n = n()), group = "TRTA", reference_group = 1, order = 1:3)))
+  expect_error(metalite:::validate_outdata(outdata(meta = meta_example(), population = "apat", observation = "wk12", parameter = "rel", n = meta$data_population %>% dplyr::group_by(TRTA) %>% dplyr::summarize(n = dplyr::n()), group = "TRTA", reference_group = "Placebo", order = 1:3)))
+  expect_error(metalite:::validate_outdata(outdata(meta = meta_example(), population = "apat", observation = "wk12", parameter = "rel", n = meta$data_population %>% dplyr::group_by(TRTA) %>% dplyr::summarize(n = dplyr::n()), group = "TRTA", reference_group = 1, order = c("Placebo", "Xanomeline Low Dose", "Xanomeline High Dose"))))
+  expect_error(metalite:::validate_outdata(outdata(meta = meta_example(), population = 1, observation = "wk12", parameter = "rel", n = meta$data_population %>% dplyr::group_by(TRTA) %>% dplyr::summarize(n = dplyr::n()), group = "TRTA", reference_group = 1, order = 1:3)))
+  expect_error(metalite:::validate_outdata(outdata(meta = meta_example(), population = "apat", observation = "wk12", parameter = "rel", n = meta$data_population %>% dplyr::group_by(TRTA) %>% dplyr::summarize(n = dplyr::n()), group = "TRTA", reference_group = 1:2, order = 1:3)))
+  expect_error(metalite:::validate_outdata(outdata(meta = meta_example(), population = c("apat", "ITT"), observation = "wk12", parameter = "rel", n = meta$data_population %>% dplyr::group_by(TRTA) %>% dplyr::summarize(n = dplyr::n()), group = "TRTA", reference_group = 1, order = 1:3)))
 })
diff --git a/tests/testthat/test-independent-testing-plan.R b/tests/testthat/test-independent-testing-plan.R
index 3ea7c44..5e62dca 100644
--- a/tests/testthat/test-independent-testing-plan.R
+++ b/tests/testthat/test-independent-testing-plan.R
@@ -1,6 +1,3 @@
-library(dplyr)
-
-
 test_that("error is thrown", {
   expect_error(metalite::plan(c("ae_summary", "ae_specific"), population = "apat", observation = c("wk12", "wk24"), parameter = "any;rel"))
 })