diff --git a/tests/testthat/test-class-comment.R b/tests/testthat/test-class-comment.R
index 9374d3947..6c2db840d 100644
--- a/tests/testthat/test-class-comment.R
+++ b/tests/testthat/test-class-comment.R
@@ -57,13 +57,13 @@ test_that("comments", {
 
   expect_silent(wb$add_comment(1, dims = "F1", comment = c3))
 
-  expect_true(length(wb$comments) == 1)
-  expect_true(length(wb$comments[[1]]) == 3)
+  expect_length(wb$comments, 1)
+  expect_length(wb$comments[[1]], 3)
 
   expect_silent(wb$remove_comment(1, dims = "B10"))
 
-  expect_true(length(wb$comments) == 1)
-  expect_true(length(wb$comments[[1]]) == 2)
+  expect_length(wb$comments, 1)
+  expect_length(wb$comments[[1]], 2)
 
   expect_silent(wb_save(wb, tmp))
 
@@ -376,6 +376,6 @@ test_that("background colors work", {
 
   wb$add_comment(sheet = 1, dims = wb_dims(3, 6), comment = wb_comment(text = txt), color = wb_color("green"))
 
-  expect_true(grepl("fillcolor=\"#00FF00\"", wb$vml[[1]]))
+  expect_match(wb$vml[[1]], "fillcolor=\"#00FF00\"")
 
 })
diff --git a/tests/testthat/test-class-workbook.R b/tests/testthat/test-class-workbook.R
index 8bbf88b81..07de27765 100644
--- a/tests/testthat/test-class-workbook.R
+++ b/tests/testthat/test-class-workbook.R
@@ -401,8 +401,8 @@ test_that("clone worksheet", {
   wb <- wb_load(fl)
   wb$clone_worksheet(2, "Clone 1")
 
-  expect_true(grepl("test", wb$charts$chart[2]))
-  expect_true(grepl("'Clone 1'", wb$charts$chart[3]))
+  expect_match(wb$charts$chart[2], "test")
+  expect_match(wb$charts$chart[3], "'Clone 1'")
   # wb$open()
 
   # clone slicer ----------------------------------------------------------
@@ -622,9 +622,10 @@ test_that("add_drawing works", {
     add_mschart(dims = "A1", graph = scatter_plot)$
     add_mschart(dims = "F4:L20", graph = scatter_plot)
 
-  expect_true(grepl("absoluteAnchor", wb$drawings))
-  expect_true(grepl("oneCellAnchor", wb$drawings))
-  expect_true(grepl("twoCellAnchor", wb$drawings))
+  drawings <- as.character(wb$drawings)
+  expect_match(drawings, "absoluteAnchor")
+  expect_match(drawings, "oneCellAnchor")
+  expect_match(drawings, "twoCellAnchor")
 
 })
 
@@ -653,7 +654,7 @@ test_that("add_chartsheet works", {
 
   expect_equal(nrow(wb$charts), 1)
 
-  expect_true(grepl("A &amp; B", wb$charts$chart))
+  expect_match(wb$charts$chart, "A &amp; B")
 
   expect_true(wb$is_chartsheet[[2]])
 
diff --git a/tests/testthat/test-outlines.R b/tests/testthat/test-outlines.R
index 8a442550e..e4ea8b02e 100644
--- a/tests/testthat/test-outlines.R
+++ b/tests/testthat/test-outlines.R
@@ -146,7 +146,7 @@ test_that("ungroup rows", {
     ungroup_rows("Sheet 1", 1:4)
 
   got <- wb$worksheets[[1]]$sheet_data$row_attr$outlineLevel
-  expect_true(all(got == ""))
+  expect_setequal(got, "")
 
 })
 
diff --git a/tests/testthat/test-page_setup.R b/tests/testthat/test-page_setup.R
index 8d5456691..180d94f93 100644
--- a/tests/testthat/test-page_setup.R
+++ b/tests/testthat/test-page_setup.R
@@ -25,13 +25,13 @@ test_that("Page setup", {
   expect_equal(wb$worksheets[[1]]$pageSetup, wb$worksheets[[2]]$pageSetup)
 
   v <- gsub(" ", "", wb$worksheets[[1]]$pageSetup, fixed = TRUE)
-  expect_true(grepl('paperSize="1"', v))
-  expect_true(grepl('orientation="landscape"', v))
-  expect_true(grepl('fitToWidth="1"', v))
-  expect_true(grepl('fitToHeight="1"', v))
+  expect_match(v, 'paperSize="1"')
+  expect_match(v, 'orientation="landscape"')
+  expect_match(v, 'fitToWidth="1"')
+  expect_match(v, 'fitToHeight="1"')
 
   pr <- wb$worksheets[[1]]$sheetPr
-  expect_true(grepl('<outlinePr summaryBelow="1" summaryRight="1"/>', pr, fixed = TRUE))
+  expect_match(pr, '<outlinePr summaryBelow="1" summaryRight="1"/>', fixed = TRUE)
 
   pr <- wb$worksheets[[3]]$sheetPr
   expect_equal("<sheetPr><tabColor rgb=\"FF00FF00\"/></sheetPr>", pr)
@@ -41,7 +41,7 @@ test_that("Page setup", {
   )
 
   pr <- wb$worksheets[[3]]$sheetPr
-  expect_equal("<sheetPr/>", pr)
+  expect_equal(pr, "<sheetPr/>")
 
 })
 
diff --git a/tests/testthat/test-pugi_cpp.R b/tests/testthat/test-pugi_cpp.R
index 1bddcd04d..ea88c0912 100644
--- a/tests/testthat/test-pugi_cpp.R
+++ b/tests/testthat/test-pugi_cpp.R
@@ -126,14 +126,14 @@ test_that("xml_append_child", {
   expect_equal(xml_node, "<a><b><c>a&amp;b<d/></c></b><c>a&amp;b</c></a>")
 
   # check that pointer is valid
-  expect_true(inherits(xml_append_child1(read_xml(xml_node), xml_child, pointer = TRUE), "pugi_xml"))
-  expect_true(inherits(xml_append_child1(read_xml(xml_node), xml_child, pointer = TRUE), "pugi_xml"))
+  expect_s3_class(xml_append_child1(read_xml(xml_node), xml_child, pointer = TRUE), "pugi_xml")
+  expect_s3_class(xml_append_child1(read_xml(xml_node), xml_child, pointer = TRUE), "pugi_xml")
 
-  expect_true(inherits(xml_append_child2(read_xml(xml_node), xml_child, level1 = "a", pointer = TRUE), "pugi_xml"))
-  expect_true(inherits(xml_append_child2(read_xml(xml_node), xml_child, level1 = "a", pointer = TRUE), "pugi_xml"))
+  expect_s3_class(xml_append_child2(read_xml(xml_node), xml_child, level1 = "a", pointer = TRUE), "pugi_xml")
+  expect_s3_class(xml_append_child2(read_xml(xml_node), xml_child, level1 = "a", pointer = TRUE), "pugi_xml")
 
-  expect_true(inherits(xml_append_child3(read_xml(xml_node), xml_child, level1 = "a", level2 = "b", pointer = TRUE), "pugi_xml"))
-  expect_true(inherits(xml_append_child3(read_xml(xml_node), xml_child, level1 = "a", level2 = "b", pointer = TRUE), "pugi_xml"))
+  expect_s3_class(xml_append_child3(read_xml(xml_node), xml_child, level1 = "a", level2 = "b", pointer = TRUE), "pugi_xml")
+  expect_s3_class(xml_append_child3(read_xml(xml_node), xml_child, level1 = "a", level2 = "b", pointer = TRUE), "pugi_xml")
 
 })
 
diff --git a/tests/testthat/test-pugixml.R b/tests/testthat/test-pugixml.R
index c38f9a7d0..0355356c6 100644
--- a/tests/testthat/test-pugixml.R
+++ b/tests/testthat/test-pugixml.R
@@ -13,7 +13,7 @@ test_that("read_xml", {
   x <- read_xml("<a><b/></a>")
   exp <- "<a>\n  <b/>\n</a>"
 
-  expect_true(inherits(x, "pugi_xml"))
+  expect_s3_class(x, "pugi_xml")
 
   xml <- "<a> </a>"
   got <- read_xml(xml, whitespace = TRUE, pointer = FALSE)
@@ -40,7 +40,7 @@ test_that("read_xml", {
 
   # a character
   y <- read_xml("<a><b/></a>", pointer = FALSE)
-  expect_true(is.character(y))
+  expect_type(y, "character")
 
   # Errors if the import was unsuccessful
   expect_error(z <- read_xml("<a><b/>"))
diff --git a/tests/testthat/test-read_sources.R b/tests/testthat/test-read_sources.R
index 61b137df2..609036ae6 100644
--- a/tests/testthat/test-read_sources.R
+++ b/tests/testthat/test-read_sources.R
@@ -162,9 +162,10 @@ test_that("reading charts", {
 
   unzip(temp, exdir = xlsx_unzip)
   overrides <- xml_node(read_xml(paste0(xlsx_unzip, "/[Content_Types].xml"), pointer = FALSE), "Types", "Override")
+  expect_match(overrides, "chartshapes", all = FALSE)
+
   unlink(xlsx_unzip, recursive = TRUE)
 
-  expect_true(any(grepl("chartshapes", overrides)))
 
   # check that the image is valid and was placed on the correct sheet and drawing
   exp <- c(
@@ -185,7 +186,7 @@ test_that("reading charts", {
   rmsheet <- length(wb$worksheets) - 2
   wb$remove_worksheet(rmsheet)
 
-  expect_false(any(grepl("drawing21.xml", unlist(wb$worksheets_rels))))
+  expect_no_match(unlist(wb$worksheets_rels), "drawing21.xml")
   expect_equal(wb$drawings[[21]], "")
   expect_equal(wb$drawings_rels[[21]], "")
 
@@ -229,16 +230,15 @@ test_that("load file with connection", {
   wb <- wb_load(testfile_path("connection.xlsx"))
 
   expect_false(is.null(wb$customXml))
-  expect_equal(length(wb$customXml), 3)
+  expect_length(wb$customXml, 3)
 
   wb$save(temp)
 
   wb <- wb_load(temp)
-  expect_equal(length(wb$customXml), 3)
-
-  expect_true(grepl("customXml/_rels/item1.xml.rels", wb$customXml[1]))
-  expect_true(grepl("customXml/item1.xml", wb$customXml[2]))
-  expect_true(grepl("customXml/itemProps1.xml", wb$customXml[3]))
+  expect_length(wb$customXml, 3)
+  expect_match(wb$customXml[1], "customXml/_rels/item1.xml.rels")
+  expect_match(wb$customXml[2], "customXml/item1.xml")
+  expect_match(wb$customXml[3], "customXml/itemProps1.xml")
 
 })
 
@@ -360,7 +360,7 @@ test_that("reading multiple slicers on a pivot table works", {
 test_that("reading slicer for tables works", {
   fl <- testfile_path("table_slicer.xlsx")
   wb <- wb_load(fl)
-  expect_true(grepl("<x14:slicerCache r:id=\"rId100001\"/>", wb$workbook$extLst))
+  expect_match(wb$workbook$extLst, "<x14:slicerCache r:id=\"rId100001\"/>")
 })
 
 test_that("hyperlinks work", {
diff --git a/tests/testthat/test-wb_functions.R b/tests/testthat/test-wb_functions.R
index c82b8486d..d48ea3995 100644
--- a/tests/testthat/test-wb_functions.R
+++ b/tests/testthat/test-wb_functions.R
@@ -448,10 +448,10 @@ test_that("improve non consecutive dims", {
   exp <- dims_to_dataframe(dims, fill = TRUE)
   exp <- unname(unlist(exp[exp != ""]))
   got <- wb1$worksheets[[1]]$sheet_data$cc$r[wb1$worksheets[[1]]$sheet_data$cc$c_s != ""]
-  expect_true(all(exp %in% got))
+  expect_contains(got, exp)
 
   got <- wb2$worksheets[[1]]$sheet_data$cc$r[wb2$worksheets[[1]]$sheet_data$cc$c_s != ""]
-  expect_true(all(exp %in% got))
+  expect_contains(got, exp)
 
   ### Test rowwise
   # dims <- "D5:E5,I5:J5,C6:F6,H6:K6,B7:L9,C10:K10,D11:J11,E12:I12,F13:H13,G14"
@@ -473,9 +473,8 @@ test_that("improve non consecutive dims", {
   exp <- dims_to_dataframe(dims, fill = TRUE)
   exp <- unname(unlist(exp[exp != ""]))
   got <- wb3$worksheets[[1]]$sheet_data$cc$r[wb3$worksheets[[1]]$sheet_data$cc$c_s != ""]
-  expect_true(all(exp %in% got))
+  expect_contains(got, exp)
 
   got <- wb4$worksheets[[1]]$sheet_data$cc$r[wb4$worksheets[[1]]$sheet_data$cc$c_s != ""]
-  expect_true(all(exp %in% got))
-
+  expect_contains(got, exp)
 })
diff --git a/tests/testthat/test-wb_styles.R b/tests/testthat/test-wb_styles.R
index 9fbee97cc..d8c32ab52 100644
--- a/tests/testthat/test-wb_styles.R
+++ b/tests/testthat/test-wb_styles.R
@@ -909,6 +909,6 @@ test_that("dims work", {
     style = wb$styles_mgr$get_xf_id("xf")
   )
 
-  expect_true(all(wb$worksheets[[1]]$sheet_data$cc$c_s == "1"))
+  expect_setequal(wb$worksheets[[1]]$sheet_data$cc$c_s, "1")
 
 })
diff --git a/tests/testthat/test-write.R b/tests/testthat/test-write.R
index cfbe9cd7f..8028a29a1 100644
--- a/tests/testthat/test-write.R
+++ b/tests/testthat/test-write.R
@@ -581,7 +581,7 @@ test_that("writing slicers works", {
   expect_equal("x15:timelineCacheRefs", xml_node_name(wb$workbook$extLst, "extLst", "ext"))
   expect_equal("timelines", xml_node_name(wb$timelines))
   expect_equal("timelineCacheDefinition", xml_node_name(wb$timelineCaches))
-  expect_true(grepl("x15:timelineRefs", wb$worksheets[[2]]$extLst))
+  expect_match(wb$worksheets[[2]]$extLst, "x15:timelineRefs")
 
   wb$add_slicer(df, slicer = "lttr", pivot_table = "pivot1")