diff --git a/R/utils_plot.R b/R/utils_plot.R
index 3197bd2..74cda01 100644
--- a/R/utils_plot.R
+++ b/R/utils_plot.R
@@ -392,9 +392,8 @@ plotMultipartiteMatrix = function(listMat, E, nbNodes, namesFG,namesLayers, dist
     testRow <- vapply(1:(nbSep*nbFG),function(i){1*(G[separRow$FG_row_index[i],separRow$FG_col_index[i]]==1)},1)
     separRow <- separRow[testRow==1,]
 
-
-    g <- g + geom_vline(data= separCol, aes(xintercept =  .data$sepCol),size= currentOptions$line.width, col=currentOptions$line.color)
-    g <- g + geom_hline(data= separRow, aes(yintercept = .data$sepRow),size= currentOptions$line.width, col=currentOptions$line.color)
+    g <- g + geom_vline(data= separCol, aes(xintercept =  .data$sepCol), linewidth = currentOptions$line.width, col=currentOptions$line.color)
+    g <- g + geom_hline(data= separRow, aes(yintercept = .data$sepRow), linewidth = currentOptions$line.width, col=currentOptions$line.color)
   }
 
   if (!is.null(currentOptions$title)){g <- g + ggtitle(currentOptions$title) }
@@ -485,14 +484,14 @@ plotMeso <- function(thetaMean, pi,model,directed,bipartite,nbNodes,nodeLabels,p
     colnames(alpha.norm) <- paste(vertex.label$col,1:length(pi$col),sep='')
     rownames(alpha.norm) <- paste(vertex.label$row,1:length(pi$row),sep='')
     vlab <- c(rownames(alpha.norm),colnames(alpha.norm))
-    g <- igraph::graph_from_incidence_matrix(alpha.norm, weighted = TRUE)
+    g <- suppressWarnings(igraph::graph_from_incidence_matrix(alpha.norm, weighted = TRUE))
     u <- c(pi$row*nbNodes[1],pi$col*nbNodes[2])
     if (is.null(layout)){ layout <- igraph::layout_as_bipartite(g)}
   }else{
     vlab <- paste(vertex.label,1:length(pi),sep = "")
     u <- pi*nbNodes[1]
     mode <- ifelse(directed,'directed','undirected')
-    g <- igraph::graph.adjacency(alpha.norm, mode = mode, weighted = TRUE)
+    g <- suppressWarnings(igraph::graph.adjacency(alpha.norm, mode = mode, weighted = TRUE))
     if (is.null(layout)){layout <- igraph::layout_with_fr(g)}
   }
 
diff --git a/tests/testthat/test-MultipartiteSBM.R b/tests/testthat/test-MultipartiteSBM.R
index eefd47e..3f479ec 100644
--- a/tests/testthat/test-MultipartiteSBM.R
+++ b/tests/testthat/test-MultipartiteSBM.R
@@ -70,9 +70,10 @@ test_that("initializing Multipartite SBM works", {
     expect_lt(myMBM$ICL, myMBM$loglik)
 
     # S3 methods
-    ## expect_silent(plot(myMBM, type = "data"))
+    #
+    expect_silent(plot(myMBM, type = "data"))
     expect_silent(plot(myMBM, type = "meso"))
-    ##  expect_silent(plot(myMBM, type = "expected"))
+    expect_silent(plot(myMBM, type = "expected"))
     expect_equal(coef(myMBM, 'connectivity'), myMBM$connectParam)
     expect_equal(coef(myMBM, 'block')       , myMBM$blockProp)