diff --git a/R/summarize-expr-block.R b/R/summarize-expr-block.R
index 10e9065..ed650e1 100644
--- a/R/summarize-expr-block.R
+++ b/R/summarize-expr-block.R
@@ -32,7 +32,7 @@ new_summarize_expr_block <- function(new_cols = NULL,
     if (inherits(ans, "try-error")) {
       return(expression())
     }
-    res
+    ans
   }
 
   parse_cols <- function(new_cols) {
diff --git a/tests/testthat/test-admiral-dpc-block.R b/tests/testthat/test-admiral-dpc-block.R
index 4c1091f..5dfe39a 100644
--- a/tests/testthat/test-admiral-dpc-block.R
+++ b/tests/testthat/test-admiral-dpc-block.R
@@ -2,8 +2,7 @@ test_that("admiral-dpc-block", {
   data <- datasets::BOD
   data$PARAMCD <- as.character(seq_len(nrow(data)))
 
-  block <- admiral_dpc_block(
-    data,
+  block <- new_admiral_dpc_block(
     by_vars = "Time",
     parameters = c("4", "5"),
     set_values_to = c(
@@ -12,6 +11,8 @@ test_that("admiral-dpc-block", {
     )
   )
 
+  block <- initialize_block(block, data)
+
   expect_s3_class(block, "admiral_dpc_block")
   expect_type(block, "list")
 
diff --git a/tests/testthat/test-filter-expr-block.R b/tests/testthat/test-filter-expr-block.R
index 0642202..6b4c406 100644
--- a/tests/testthat/test-filter-expr-block.R
+++ b/tests/testthat/test-filter-expr-block.R
@@ -1,6 +1,7 @@
 test_that("filter-expr-block", {
   data <- datasets::iris
-  block <- filter_expr_block(data, value = c("Species == 'virginica'"))
+  block <- new_filter_expr_block(value = c("Species == 'virginica'"))
+  block <- initialize_block(block, data)
 
   expect_s3_class(block, "filter_expr_block")
   expect_type(block, "list")
@@ -10,7 +11,7 @@ test_that("filter-expr-block", {
   res <- evaluate_block(block, data)
   expect_identical(unique(as.character(res$Species)), "virginica")
 
-  res_ui <- generate_ui(filter_expr_block(data = datasets::iris), id = "test")
+  res_ui <- generate_ui(new_filter_expr_block(data = datasets::iris), id = "test")
   expect_s3_class(res_ui, "shiny.tag")
 })
 
@@ -18,8 +19,8 @@ test_that("filter-expr-block module_server handles input correctly", {
 
   # wrap generate_server
   # id as first argument, so we can test via shiny::testSever
-  module_server_test <- function(id, x, in_dat, ...) {
-    generate_server(x = x, in_dat = in_dat, id = id)
+  module_server_test <- function(id, x, in_dat, is_prev_valid, ...) {
+    generate_server(x = x, in_dat = in_dat, id = id, is_prev_valid = is_prev_valid)
   }
 
   shiny::testServer(
@@ -39,8 +40,9 @@ test_that("filter-expr-block module_server handles input correctly", {
     },
     args = list(
       id = "test",
-      x = filter_expr_block(data = datasets::iris),
-      in_dat = reactive(datasets::iris)
+      x = new_filter_expr_block(data = datasets::iris),
+      in_dat = reactive(datasets::iris),
+      is_prev_valid = shiny::reactive(TRUE)
     )
   )
 })
diff --git a/tests/testthat/test-summarize-expr-block.R b/tests/testthat/test-summarize-expr-block.R
index 274b09e..6ca9597 100644
--- a/tests/testthat/test-summarize-expr-block.R
+++ b/tests/testthat/test-summarize-expr-block.R
@@ -1,14 +1,15 @@
 test_that("summarize-expr-block", {
   data <- datasets::iris
 
-  block <- summarize_expr_block(
-    data,
+  block <- new_summarize_expr_block(
     group_by = "Species",
     new_cols = c(
       Mean.Sepal.Width = "mean(Sepal.Width)"
     )
   )
 
+  block <- initialize_block(block, data)
+
   expect_true(is_initialized(block))
   expect_s3_class(block, "summarize_expr_block")
   expect_type(block, "list")