diff --git a/tests/testthat/test_plot.R b/tests/testthat/test_plot.R
index d8a28fe..b8f66ed 100644
--- a/tests/testthat/test_plot.R
+++ b/tests/testthat/test_plot.R
@@ -56,6 +56,14 @@ test_that("Testing plot.foehnix function", {
     expect_silent(plotfun(mod0, which = 1:2, ask = FALSE))
     expect_silent(plotfun(mod1, which = 1:2, ask = FALSE))
 
+    # Posterior plot with custom freq/breaks
+    expect_silent(plotfun(mod1, which = "post")) 
+    expect_silent(plotfun(mod1, which = "post", freq = TRUE))
+    expect_silent(plotfun(mod1, which = "post", freq = FALSE))
+    expect_error(plotfun(mod1, which = "post", freq = "wrong"))
+    expect_silent(plot(mod1, which = "post", breaks = seq(0, 1, by = 0.05)))
+    expect_silent(plot(mod1, which = "post", breaks = c(0, 0.2, 0.4, 0.9, 1.0)))
+
     # Setting log to FALSE
     expect_silent(plotfun(mod0, log = FALSE, ask = FALSE))
     expect_silent(plotfun(mod1, log = FALSE, ask = FALSE))
diff --git a/tests/testthat/test_windrose.R b/tests/testthat/test_windrose.R
index 1fb4cb3..369660f 100644
--- a/tests/testthat/test_windrose.R
+++ b/tests/testthat/test_windrose.R
@@ -31,6 +31,7 @@ test_that("Testing wind rose plot functionality (basic type)", {
     # Wind speed < 0
     expect_error(windrosefun(dd = c(10,180), ff = c(-3,1)))
 
+
     # Loading some data
     expect_silent(data <- demodata("ellboegen"))
 
@@ -44,6 +45,9 @@ test_that("Testing wind rose plot functionality (basic type)", {
     expect_identical(dim(res$tab), c(length(res$dd.breaks), length(res$ff.breaks)) - 1L)
     expect_true(is.null(res$counts))
 
+    # Custom breaks
+    expect_silent(windrosefun(data, breaks = seq(0, 30, by = 2.5)))
+    expect_warning(windrosefun(data, breaks = seq(0, 10, by = 2.5)))
 
     # Second: the histogram plot
     expect_silent(res <- windrosefun(as.numeric(data$dd), as.numeric(data$ff),
@@ -63,7 +67,7 @@ test_that("Testing wind rose plot functionality (basic type)", {
     copy <- data
     names(copy)[grep("^ff$", names(copy))] <- "wind_spd"
     names(copy)[grep("^dd$", names(copy))] <- "wind_dir"
-    expect_silent(windrosefun(copy, var.ff = "wind_spd", var.dd = "wind_dir"))
+    expect_silent(windrosefun(copy, ffvar = "wind_spd", ddvar = "wind_dir"))
 
 })