diff --git a/R/biproportional-check.R b/R/biproportional-check.R
index 63b4b48..de18420 100644
--- a/R/biproportional-check.R
+++ b/R/biproportional-check.R
@@ -5,55 +5,55 @@ check_params.pukelsheim = function(votes_df, district_seats_df, new_seats_col, u
     if(!is.data.frame(votes_df) || ncol(votes_df) != 3) {
         stop("`", .votes_df, "` must be a data frame with 3 columns in the ",
              "following order:\nparty, district and votes (names can differ).",
-             call. = F)
+             call. = FALSE)
     }
 
     if(!is.numeric(votes_df[[3]]) || any(votes_df[[3]] < 0)) {
         stop("Vote values in `",
              .votes_df,
-             "`s third column must be numbers >= 0.", call. = F)
+             "`s third column must be numbers >= 0.", call. = FALSE)
     }
 
     if(length(unique(district_seats_df[[1]])) != nrow(district_seats_df)) {
         stop("District ids in `", .district_seats_df,
-             "` are not unique.", call. = F)
+             "` are not unique.", call. = FALSE)
     }
     if(nrow(votes_df[,c(1,2)]) != nrow(unique(votes_df[,c(1,2)]))) {
         stop("There are duplicate party-district pairs in `", .votes_df, "`.",
-             call. = F)
+             call. = FALSE)
     }
 
     if(!all(district_seats_df[[1]] %in% votes_df[[2]])) {
         if(all(district_seats_df[[1]] %in% votes_df[[1]])) {
             stop("District ids not found in second column of `", .votes_df,
                  "`. Are columns in the correct order (party, district, votes)?",
-                 call. = F)
+                 call. = FALSE)
         }
         stop("Not all district ids in `", .district_seats_df, "`s first column ",
-             "exist in `", .votes_df, "`s second column.", call. = F)
+             "exist in `", .votes_df, "`s second column.", call. = FALSE)
     }
 
     if(!all(votes_df[[2]] %in% district_seats_df[[1]])) {
         stop("Not all district ids in `", .votes_df, "`s second column exist in `",
-             .district_seats_df, "`s first column.", call. = F)
+             .district_seats_df, "`s first column.", call. = FALSE)
     }
 }
 
 prep_votes_matrix = function(votes_matrix, votes_matrix.name) {
     vmn = paste0("`", votes_matrix.name, "`")
     if(!is.matrix(votes_matrix)) {
-        stop(vmn, " must be a matrix.", call. = F)
+        stop(vmn, " must be a matrix.", call. = FALSE)
     }
     if(sum(votes_matrix %% 1) != 0) {
-        stop(vmn, " must only contain integers.", call. = F)
+        stop(vmn, " must only contain integers.", call. = FALSE)
     }
     if(!is.null(rownames(votes_matrix)) &&
        length(unique(rownames(votes_matrix))) != nrow(votes_matrix)) {
-        stop("rownames in ", vmn , " must be unique.", call. = F)
+        stop("rownames in ", vmn , " must be unique.", call. = FALSE)
     }
     if(!is.null(colnames(votes_matrix)) &&
        length(unique(colnames(votes_matrix))) != ncol(votes_matrix)) {
-        stop("colnames in ", vmn, " must be unique.", call. = F)
+        stop("colnames in ", vmn, " must be unique.", call. = FALSE)
     }
 
     return(votes_matrix)
@@ -61,14 +61,14 @@ prep_votes_matrix = function(votes_matrix, votes_matrix.name) {
 
 prep_method = function(method) {
     if(!length(method) %in% c(1,2)) {
-        stop("Only one or two methods allowed.", call. = F)
+        stop("Only one or two methods allowed.", call. = FALSE)
     }
     if(length(method) == 1) {
         method <- c(method, method)
     }
     if(any(method == "largest_remainder_method")) {
         stop('Cannot use "largest_remainder_method", only divisor methods ',
-             'are possible in biproportional apportionment.', call. = F)
+             'are possible in biproportional apportionment.', call. = FALSE)
     }
 
     return(method)
@@ -83,20 +83,20 @@ prep_district_seats = function(district_seats, votes_matrix,
         if(ncol(votes_matrix) != length(district_seats)) {
             stop("`", .votes_matrix.name,
                  "` needs to have districts as columns and parties as rows.",
-                 call. = F)
+                 call. = FALSE)
         }
         if(!is.null(colnames(votes_matrix))) {
             if(is.null(names(district_seats)) ||
                !all(sort(colnames(votes_matrix)) == sort(names(district_seats)))) {
                 stop(.district_seats.name,
                      " needs to have the same names as the columns in ",
-                     .votes_matrix.name, ".", call. = F)
+                     .votes_matrix.name, ".", call. = FALSE)
             }
             district_seats <- district_seats[colnames(votes_matrix)]
         }
     }
     if(sum(district_seats %% 1) != 0) {
-        stop("`", .district_seats.name, "` must be integers.", call. = F)
+        stop("`", .district_seats.name, "` must be integers.", call. = FALSE)
     }
     assert(is.atomic(district_seats))
 
diff --git a/R/biproportional.R b/R/biproportional.R
index 9f0821d..066d956 100644
--- a/R/biproportional.R
+++ b/R/biproportional.R
@@ -242,7 +242,7 @@ upper_apportionment = function(votes_matrix, district_seats,
 
     # check enough votes in districts
     if(!identical(colSums(votes_matrix) > 0, seats_district > 0)) {
-        stop("No votes in a district with at least one seat", call. = F)
+        stop("No votes in a district with at least one seat", call. = FALSE)
     }
 
     # return values
@@ -341,7 +341,7 @@ lower_apportionment = function(votes_matrix, seats_cols,
         method_impl <- get_method_implementation(method)
         if(method_impl != "divisor_round") {
             warning('Lower apportionment is only guaranteed to terminate with the default ',
-                    'Sainte-Lagu\u00EB/Webster method (method = "round")', call. = F)
+                    'Sainte-Lagu\u00EB/Webster method (method = "round")', call. = FALSE)
         }
         round_func = get_round_function(method_impl)
     }
@@ -456,7 +456,7 @@ find_divisor = function(votes,
     divisor_range = sort(c(divisor_from, divisor_to))
 
     if(any(is.infinite(votes)) || any(is.nan(votes))) {
-        stop("Result is undefined, cannot assign all seats in lower apportionment", call. = F)
+        stop("Result is undefined, cannot assign all seats in lower apportionment", call. = FALSE)
     }
 
     # Divisors should be within votes/(seats-1) and votes/(seats+1).
diff --git a/R/divisor-check.R b/R/divisor-check.R
index 8e4c5dd..809d74e 100644
--- a/R/divisor-check.R
+++ b/R/divisor-check.R
@@ -11,7 +11,7 @@ check_edge_quotient = function(mtrx_quotient, n_seats, return_indices = FALSE) {
     if(quotient_last_with == quotient_first_without) {
         indices = which(mtrx_quotient == quotient_last_with, arr.ind = TRUE)[,"col"]
         parties = paste0(indices, collapse = " & ")
-        stop("Result is undefined, equal quotient for parties: ", parties, call. = F)
+        stop("Result is undefined, equal quotient for parties: ", parties, call. = FALSE)
     }
 }
 
@@ -25,7 +25,7 @@ check_enough_seats = function(votes, n_seats, method) {
         return()
     }
     stop("With ", method," rounding there must be at least as many seats as ",
-         "there are parties with non-zero votes.", call. = F)
+         "there are parties with non-zero votes.", call. = FALSE)
 }
 
 check_seats_number = function(n_seats, n_seats.name) {
@@ -34,7 +34,7 @@ check_seats_number = function(n_seats, n_seats.name) {
        n_seats >= 0) {
         return()
     }
-    stop("`", n_seats.name, "` must be an integer >= 0", call. = F)
+    stop("`", n_seats.name, "` must be an integer >= 0", call. = FALSE)
 }
 
 check_votes_vector = function(votes, votes.name) {
@@ -42,5 +42,5 @@ check_votes_vector = function(votes, votes.name) {
        all(votes >= 0) && is.vector(votes)) {
         return()
     }
-    stop("`", votes.name, "` must be a numeric vector >= 0", call. = F)
+    stop("`", votes.name, "` must be a numeric vector >= 0", call. = FALSE)
 }
diff --git a/R/divisor.R b/R/divisor.R
index 8c4942d..186c6ab 100644
--- a/R/divisor.R
+++ b/R/divisor.R
@@ -34,7 +34,7 @@ highest_averages_method = function(votes, n_seats, divisors) {
     if(length(divisors) == 1) {
         divisors <- seq(from = divisors, by = 1, length.out = n_seats)
     } else if(length(divisors) != n_seats) {
-        stop("Number of divisors is not equal to the number of seats", call. = F)
+        stop("Number of divisors is not equal to the number of seats", call. = FALSE)
     }
     n_parties = length(votes)
 
diff --git a/R/proporz.R b/R/proporz.R
index 9c6f78c..b176eb5 100644
--- a/R/proporz.R
+++ b/R/proporz.R
@@ -71,7 +71,7 @@ get_method_implementation = function(method_name) {
     method_name <- tolower(method_name)
     if(!method_name %in% names(proporz_methods)) {
         stop("Unknown apportion method: ", method_name, ".\nAvailable: ",
-             paste0(names(proporz_methods), collapse=", "), call. = F)
+             paste0(names(proporz_methods), collapse=", "), call. = FALSE)
     }
     return(proporz_methods[[method_name]])
 }
diff --git a/R/quorum.R b/R/quorum.R
index c35021e..fac0cae 100644
--- a/R/quorum.R
+++ b/R/quorum.R
@@ -150,7 +150,7 @@ reached_quorums = function(votes_matrix, quorum_funcs) {
     assert(is.matrix(votes_matrix))
     if(!is.list(quorum_funcs) || !is.function(quorum_funcs[[1]])) {
         stop("`", deparse(substitute(quorum_funcs)),
-             "` is not a list of functions.", call. = F)
+             "` is not a list of functions.", call. = FALSE)
     }
 
     # list of vector whether quorum was reached for each party
@@ -161,7 +161,7 @@ reached_quorums = function(votes_matrix, quorum_funcs) {
     if(length(quorum_funcs) == 1) {
         return(quorum_funcs[[1]](votes_matrix))
     } else if(is.null(attributes(quorum_funcs)$type)) {
-        stop("type must be set as list attribute.", call. = F)
+        stop("type must be set as list attribute.", call. = FALSE)
     }
 
     quorum_matrix = do.call(cbind, has_reached_quorum)
@@ -170,7 +170,7 @@ reached_quorums = function(votes_matrix, quorum_funcs) {
     } else if(attributes(quorum_funcs)$type == "ANY") {
         quorum_bool = apply(quorum_matrix, 1, any)
     } else {
-        stop("Unknown type `", attributes(quorum_funcs)$type, "`.", call. = F)
+        stop("Unknown type `", attributes(quorum_funcs)$type, "`.", call. = FALSE)
     }
     return(quorum_bool)
 }
@@ -187,7 +187,7 @@ apply_quorum_matrix = function(votes_matrix, quorum) {
         stopifnot(length(quorum) == nrow(votes_matrix))
         quorum_bool = quorum
     } else {
-        stop("Cannot parse quorum function or vector.", call. = F)
+        stop("Cannot parse quorum function or vector.", call. = FALSE)
     }
 
     if(any(!quorum_bool)) {
@@ -207,7 +207,7 @@ apply_quorum_vector = function(votes_vector, quorum) {
     }
 
     if(all(votes_vector < quorum)) {
-        stop("No party reached the quorum.", call. = F)
+        stop("No party reached the quorum.", call. = FALSE)
     }
 
     votes_vector[votes_vector < quorum] <- 0
diff --git a/R/quota.R b/R/quota.R
index a2c7bc6..bd4f54e 100644
--- a/R/quota.R
+++ b/R/quota.R
@@ -63,7 +63,7 @@ lr_quota = function(votes, n_seats, method = "hare") {
     if(method %in% c("hare", "hare-niemeyer", "vinton", "simple")) {
         quota = sum(votes)/n_seats
     } else {
-        stop("Unknown quota method '", method, "'", call. = F)
+        stop("Unknown quota method '", method, "'", call. = FALSE)
     }
     return(quota)
 }
@@ -76,6 +76,6 @@ check_equal_entries = function(remainders, ordered_remainders, n_seats_remaining
         indices = which(remainders == remainder_last_with, arr.ind = TRUE)
         parties = paste0(indices, collapse = " & ")
         stop("Result is undefined, equal remainder for parties: ", parties,
-             call. = F)
+             call. = FALSE)
     }
 }
diff --git a/R/round.R b/R/round.R
index 1052267..4e258b9 100644
--- a/R/round.R
+++ b/R/round.R
@@ -23,7 +23,7 @@ ceil_at = function(x, threshold) {
 
     if(is.numeric(threshold)) {
         if(threshold < 0 || threshold > 1) {
-            stop("Threshold argument must be in [0,1].", call. = F)
+            stop("Threshold argument must be in [0,1].", call. = FALSE)
         }
         threshold <- floor(values) + threshold
     } else if(threshold == "harmonic") {
@@ -32,7 +32,7 @@ ceil_at = function(x, threshold) {
         threshold <- threshold_geometric(values)
     } else {
         stop('Numeric value, "harmonic" or "geometric" expected for threshold argument.',
-             call. = F)
+             call. = FALSE)
     }
 
     ceiled = ceiling(values)
diff --git a/R/shinyapp.R b/R/shinyapp.R
index 0b5752a..4b5b769 100644
--- a/R/shinyapp.R
+++ b/R/shinyapp.R
@@ -17,10 +17,10 @@
 run_app = function(votes_matrix = NULL, district_seats = NULL) {
     # load packages / "import" ####
     if(!requireNamespace("shiny", quietly = TRUE)) {
-        stop("Please install shiny: install.packages('shiny')", call. = F)
+        stop("Please install shiny: install.packages('shiny')", call. = FALSE)
     }
     if(!requireNamespace("shinyMatrix", quietly = TRUE)) {
-        stop("Please install shinyMatrix: install.packages('shinyMatrix')", call. = F)
+        stop("Please install shinyMatrix: install.packages('shinyMatrix')", call. = FALSE)
     }
     tags = shiny::tags
     fluidRow = shiny::fluidRow
diff --git a/R/utils.R b/R/utils.R
index cda33d9..76bcec7 100644
--- a/R/utils.R
+++ b/R/utils.R
@@ -98,7 +98,7 @@ pivot_to_df = function(matrix_wide, value_colname = "values") {
 assert = function(check) {
     if(!all(check)) {
         .x = deparse(substitute(check))
-        stop(.x, " is not TRUE", call. = F)
+        stop(.x, " is not TRUE", call. = FALSE)
     }
     invisible()
 }
diff --git a/data-raw/finland2019.R b/data-raw/finland2019.R
index 89419a1..e7f911e 100644
--- a/data-raw/finland2019.R
+++ b/data-raw/finland2019.R
@@ -11,7 +11,7 @@ zip::unzip(zipfile, exdir = "finland_2019")
 
 # Load data ####
 suomi19.csv = data.table::fread("finland_2019/ekv-2019_tpat_maa.csv",
-                                header = F,
+                                header = FALSE,
                                 encoding = "Latin-1")
 
 suomi19 <- suomi19.csv |>
diff --git a/tests/testthat/test-biproportional.R b/tests/testthat/test-biproportional.R
index de03dcc..ed8b7cf 100644
--- a/tests/testthat/test-biproportional.R
+++ b/tests/testthat/test-biproportional.R
@@ -58,8 +58,8 @@ test_that("quorum with vote counts", {
     expect_equal(reached_quorum_any_district(vm, 35), rowSums(q1) > 0)
     expect_equal(reached_quorum_total(vm, 45), rowSums(q2) > 0)
 
-    expect_equal(sum(apply_quorum_matrix(vm, c(F,F,F))), 0)
-    expect_equal(sum(apply_quorum_matrix(vm, c(F,T,F))), 30)
+    expect_equal(sum(apply_quorum_matrix(vm, c(FALSE,FALSE,FALSE))), 0)
+    expect_equal(sum(apply_quorum_matrix(vm, c(FALSE,TRUE,FALSE))), 30)
     expect_error_fixed(apply_quorum_matrix(vm, "x"), "Cannot parse quorum function or vector.")
 })
 
@@ -78,10 +78,10 @@ test_that("quorum with percentages counts", {
 test_that("quorum", {
     vm = matrix(c(90, 4, 5, 1, 104, 4, 1, 1), ncol = 2)*10
 
-    q_district = c(T,F,T,F)
-    q_total = c(T,T,F,F)
-    q_district_and_total = c(T,F,F,F)
-    q_district_or_total = c(T,T,T,F)
+    q_district = c(TRUE,FALSE,TRUE,FALSE)
+    q_total = c(TRUE,TRUE,FALSE,FALSE)
+    q_district_and_total = c(TRUE,FALSE,FALSE,FALSE)
+    q_district_or_total = c(TRUE,TRUE,TRUE,FALSE)
 
     # reached_quorums
     expect_equal(reached_quorums(vm, quorum_any(any_district = 0.05)),
@@ -275,11 +275,11 @@ test_that("almost empty vote_matrix", {
 test_that("undefined result biproportional", {
     seats = c(10, 20, 1, 1)
     set.seed(1284)
-    vm = matrix(runif(4*10), ncol = 4) * matrix(rep(seats, 10), byrow = T, ncol = 4) * 1000
+    vm = matrix(runif(4*10), ncol = 4) * matrix(rep(seats, 10), byrow = TRUE, ncol = 4) * 1000
     vm <- round(vm)
     vm[vm < 200] <- 0
 
-    expect_equal(upper_apportionment(vm, seats, use_list_votes = F)$party,
+    expect_equal(upper_apportionment(vm, seats, use_list_votes = FALSE)$party,
                  proporz(rowSums(vm), sum(seats), "round"))
 
     expect_error_fixed(upper_apportionment(vm, seats),
@@ -312,7 +312,7 @@ test_that("districts with one seat", {
     seats = c(10, 20, 1, 1)
     set.seed(80)
 
-    votes_matrix = matrix(runif(4*10), ncol = 4) * matrix(rep(seats, 10), byrow = T, ncol = 4) * 100
+    votes_matrix = matrix(runif(4*10), ncol = 4) * matrix(rep(seats, 10), byrow = TRUE, ncol = 4) * 100
     votes_matrix <- round(votes_matrix)
     votes_matrix[votes_matrix < 30] <- 0
 
diff --git a/tests/testthat/test-proporz.R b/tests/testthat/test-proporz.R
index 4f0de49..23662f2 100644
--- a/tests/testthat/test-proporz.R
+++ b/tests/testthat/test-proporz.R
@@ -19,7 +19,7 @@ test_that("generic proporz", {
 }
 
 test_that("proporz parameter range", {
-    method_list = unique(unlist(proporz_methods, use.names = F))
+    method_list = unique(unlist(proporz_methods, use.names = FALSE))
 
     set.seed(0)
     for(n_parties in 1:2) {
@@ -43,7 +43,7 @@ test_that("proporz parameter range", {
                         expect_equal(sum(seats), n_seats)
 
                         if(n_seats > 0) {
-                            .quorum = sort(c(votes,0), decreasing = T)[2]+0.5
+                            .quorum = sort(c(votes,0), decreasing = TRUE)[2]+0.5
                             seats_Q = proporz(votes, n_seats, method_impl, quorum = .quorum)
                             expect_equal(sum(seats_Q > 0), 1)
                         }
@@ -67,7 +67,7 @@ test_that("proporz parameter range", {
 })
 
 test_that("quorum", {
-    method_list = unique(unlist(proporz_methods, use.names = F))
+    method_list = unique(unlist(proporz_methods, use.names = FALSE))
 
     for(method in method_list) {
         expect_error(proporz(c(50, 30), 3, method, 60), "No party reached the quorum.",
@@ -84,7 +84,7 @@ test_that("all method names", {
 
 test_that("undefined result errors", {
     expect_error(proporz(c(1, 10, 10), 1, "round"),
-                 "Result is undefined, equal quotient for parties: 2 & 3", fixed = T)
+                 "Result is undefined, equal quotient for parties: 2 & 3", fixed = TRUE)
     expect_equal(proporz(c(1, 10, 10), 2, "round"), c(0,1,1))
 
     expect_error(largest_remainder_method(c(10, 10, 0), 1),
diff --git a/tests/testthat/test-round.R b/tests/testthat/test-round.R
index dccab63..e5b8582 100644
--- a/tests/testthat/test-round.R
+++ b/tests/testthat/test-round.R
@@ -18,7 +18,7 @@ test_that("ceil_at", {
 
     expect_error(proporz(1,1, "unkown method"))
     expect_error(ceil_at(1.6, NA), "is.na")
-    expect_error(ceil_at(1.6, -1), "Threshold argument must be in [0,1]", fixed = T)
+    expect_error(ceil_at(1.6, -1), "Threshold argument must be in [0,1]", fixed = TRUE)
     expect_error(ceil_at(0.5, "x"), 'Numeric value, "harmonic" or "geometric" expected for threshold argument')
     expect_error(ceil_at(-1, 0))
     expect_error(ceil_at(NA, 0))
@@ -70,15 +70,15 @@ test_that("ceil_at harmonic/geometric matrix", {
                  0.000, 1.333333+eps, 42.494118+eps, 99.497487+eps, # harmonic
                  0.000, 1.414214+eps, 42.497059+eps, 99.498744+eps, # geometric
                  0.500, 1.500000, 42.500000, 99.500000, # round
-                 x+1), nrow = 5, byrow = T)
+                 x+1), nrow = 5, byrow = TRUE)
 
-    R_0.5 = matrix(c(x,x,x,x+1,x+1), nrow = 5, byrow = T)
+    R_0.5 = matrix(c(x,x,x,x+1,x+1), nrow = 5, byrow = TRUE)
     expect_equal(ceil_at(M, 0.5), R_0.5)
 
-    R_geometric = matrix(c(x, x, c(0,x_non0+1), x+1, x+1), nrow = 5, byrow = T)
+    R_geometric = matrix(c(x, x, c(0,x_non0+1), x+1, x+1), nrow = 5, byrow = TRUE)
     expect_equal(ceil_at(M, "geometric"), R_geometric)
 
-    R_harmonic = matrix(c(x, c(0,x_non0+1), c(0,x_non0+1), x+1, x+1), nrow = 5, byrow = T)
+    R_harmonic = matrix(c(x, c(0,x_non0+1), c(0,x_non0+1), x+1, x+1), nrow = 5, byrow = TRUE)
     expect_equal(ceil_at(M, "harmonic"), R_harmonic)
 
     expect_equal(threshold_geometric(18.4), threshold_geometric(18.5))
diff --git a/tests/testthat/test-utils.R b/tests/testthat/test-utils.R
index a029a84..d5bca9f 100644
--- a/tests/testthat/test-utils.R
+++ b/tests/testthat/test-utils.R
@@ -24,7 +24,7 @@ test_that("quorum", {
 test_that("stupid pivot functions", {
     df0 = data.frame(id = c("a", "a", "a", "a", "b", "b"),
                      key = c("w", "x", "y", "z", "x", "y"),
-                     value = 1:6, stringsAsFactors = F)
+                     value = 1:6, stringsAsFactors = FALSE)
 
     matrix1 = pivot_to_matrix(df0)
     expect_equal(pivot_to_matrix(df0[c(2,1,3)]),
diff --git a/vignettes/apportionment_scenarios.Rmd b/vignettes/apportionment_scenarios.Rmd
index b741c4b..7fa1ae9 100644
--- a/vignettes/apportionment_scenarios.Rmd
+++ b/vignettes/apportionment_scenarios.Rmd
@@ -126,7 +126,7 @@ df_bydistrict = data.frame(
 )
 
 # sort table by D'Hondt seats
-df_bydistrict <- df_bydistrict[order(df_bydistrict[[1]], decreasing = T),] 
+df_bydistrict <- df_bydistrict[order(df_bydistrict[[1]], decreasing = TRUE),] 
 
 # print parties with at least one seat
 knitr::kable(df_bydistrict[rowSums(df_bydistrict) > 0,])
@@ -228,7 +228,7 @@ total number of seats for the `district_seats` parameter.
 ```{r biprop_seats}
 full_biproportional = biproporz(votes_matrix, 
                                 district_seats = sum(district_seats),
-                                use_list_votes = F)
+                                use_list_votes = FALSE)
 
 # party seat distribution has not changed
 rowSums(full_biproportional) - rowSums(seats_biproportional)