diff --git a/DESCRIPTION b/DESCRIPTION
index acd1ee8..599dfdd 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -23,7 +23,13 @@ Depends: R (>= 4.3)
 Imports: dplyr, gridExtra, stringr, stats, ggplot2, stringi,
             grDevices, MSstatsTMT, MSstatsConvert, MSstats,
             data.table, Rcpp, Biostrings, checkmate, ggrepel
-Suggests: knitr, rmarkdown, tinytest, covr
+Suggests: 
+    knitr,
+    rmarkdown,
+    tinytest,
+    covr,
+    mockery,
+    testthat (>= 3.0.0)
 LazyData: true
 LinkingTo: Rcpp
 VignetteBuilder: knitr
@@ -33,3 +39,4 @@ BugReports: https://github.com/Vitek-Lab/MSstatsPTM/issues
 Encoding: UTF-8
 Roxygen: list(markdown = TRUE)
 RoxygenNote: 7.3.2
+Config/testthat/edition: 3
diff --git a/R/utils_dataProcessPlots.R b/R/utils_dataProcessPlots.R
index c74df44..05bd6cd 100644
--- a/R/utils_dataProcessPlots.R
+++ b/R/utils_dataProcessPlots.R
@@ -89,9 +89,6 @@
   ## Adjust colnames to avoid repeating code
   for (i in seq_along(data.list)) {
     colnames(data.list[[i]]) = toupper(colnames(data.list[[i]]))
-    if ('INTENSITY' %in% colnames(data.list[[i]])){
-      data.list[[i]]$ABUNDANCE = log2(data.list[[i]]$INTENSITY)
-    }
     setnames(data.list[[i]], c('LOGINTENSITIES', 'GROUP', 'PROTEIN', 
                                'Protein', 'LOG2INTENSITY'), 
              c('ABUNDANCE', 'CONDITION', 'PROTEINNAME', 'PROTEINNAME',
@@ -1755,4 +1752,4 @@
   if (address != FALSE) {
     dev.off()
   }
-}
\ No newline at end of file
+}
diff --git a/tests/testthat.R b/tests/testthat.R
new file mode 100644
index 0000000..9276dbd
--- /dev/null
+++ b/tests/testthat.R
@@ -0,0 +1,13 @@
+# This file is part of the standard setup for testthat.
+# It is recommended that you do not modify it.
+#
+# Where should you do additional test configuration?
+# Learn more about the roles of various files in:
+# * https://r-pkgs.org/testing-design.html#sec-tests-files-overview
+# * https://testthat.r-lib.org/articles/special-files.html
+
+library(testthat)
+library(mockery)
+library(MSstatsPTM)
+
+test_check("MSstatsPTM")
diff --git a/tests/testthat/test_dataProcessPlotsPTM.R b/tests/testthat/test_dataProcessPlotsPTM.R
new file mode 100644
index 0000000..87ca44d
--- /dev/null
+++ b/tests/testthat/test_dataProcessPlotsPTM.R
@@ -0,0 +1,19 @@
+test_that("Medians are equalized in ptm data to QC plot helper function", {
+    mock_qc_all_plot_lf <- mock()
+    stub(
+        dataProcessPlotsPTM, ".qc.all.plot.lf",
+        mock_qc_all_plot_lf, depth=2
+    )
+    
+    dataProcessPlotsPTM(summary.data,
+                        type = 'QCPLOT',
+                        which.PTM = "allonly",
+                        address = FALSE)
+    
+    calls <- mock_args(mock_qc_all_plot_lf)
+    ptm_data <- calls[[1]][[1]]
+    run_data = split(ptm_data, ptm_data$RUN)
+    for (i in 1:length(run_data)){
+        expect_equal(median(run_data[[i]]$ABUNDANCE, na.rm = TRUE), 22.028431)
+    }
+})