diff --git a/tests/testthat/test-simplifyArtifactData.R b/tests/testthat/test-simplifyArtifactData.R
index 4a570c69..bfd2a4c9 100644
--- a/tests/testthat/test-simplifyArtifactData.R
+++ b/tests/testthat/test-simplifyArtifactData.R
@@ -142,13 +142,13 @@ test_that("simplifyArtifactData when missing fragment sizes, low/rv/high", {
   
   # all fragments are coallated into the unspecified column
   # totals should be correct
-  # some horizons have no fragment records, should generate a warning
+  # some horizons have no fragment records
   d.missing.size <- d.artifact.hz
   d.missing.size[,c("huartsize_l", "huartsize_r", "huartsize_h")] <- NA
   d.missing.size[4,] <- d.missing.size[3,]
   d.missing.size[4,] <- NA
   d.missing.size[4,'phiid'] <- "10102"
-  expect_message(res <- simplifyArtifactData(d.missing.size, id.var = 'phiid', nullFragsAreZero = TRUE))
+  expect_silent(res <- simplifyArtifactData(d.missing.size, id.var = 'phiid', nullFragsAreZero = TRUE))
   
   # rows missing fragvol should be removed from the simplified result
   expect_true(nrow(d.missing.size) == 4)
@@ -171,8 +171,7 @@ test_that("simplifyArtifactData warning generated when NA in huartvol", {
   d.missing.artvol <- d.artifact.hz
   d.missing.artvol$huartvol <- NA
   d.missing.artvol[1,'huartvol'] <- 10
-  expect_message(simplifyArtifactData(d.missing.artvol, id.var = 'phiid', nullFragsAreZero = TRUE),
-                 regexp = 'some records are missing artifact volume')
+  expect_silent(simplifyArtifactData(d.missing.artvol, id.var = 'phiid', nullFragsAreZero = TRUE))
 })
 
 
diff --git a/tests/testthat/test-simplifyFragmentData.R b/tests/testthat/test-simplifyFragmentData.R
index b4a6dee5..1197078f 100644
--- a/tests/testthat/test-simplifyFragmentData.R
+++ b/tests/testthat/test-simplifyFragmentData.R
@@ -450,10 +450,10 @@ test_that("simplifyFragmentData complex sample data from NASIS, single horizon",
 
 test_that("simplifyFragmentData when missing fragment sizes, low/rv/high", {
   
-  # all fragments are coallated into the unspecified column
+  # all fragments are collated into the unspecified column
   # totals should be correct
-  # some horizons have no fragment records, should generate a warning
-  expect_message( { res <- simplifyFragmentData(d.missing.size, id.var = 'phiid', nullFragsAreZero = TRUE) } )
+  # some horizons have no fragment records
+  expect_silent( { res <- simplifyFragmentData(d.missing.size, id.var = 'phiid', nullFragsAreZero = TRUE) } )
   
   # rows missing fragvol should be removed from the simplified result
   expect_true(nrow(d.missing.size) == 12)
@@ -467,8 +467,7 @@ test_that("simplifyFragmentData when missing fragment sizes, low/rv/high", {
 
 test_that("simplifyFragmentData warning generated when NA in fragvol", {
   
-  expect_message(simplifyFragmentData(d.missing.fragvol, id.var = 'phiid', nullFragsAreZero = TRUE), 
-                 regexp = 'some records are missing rock fragment volume')
+  expect_silent(simplifyFragmentData(d.missing.fragvol, id.var = 'phiid', nullFragsAreZero = TRUE))
   
 })
 
@@ -482,8 +481,8 @@ test_that("simplifyFragmentData warning generated when all fragvol are NA", {
 
 
 test_that("simplifyFragmentData nullFragsAreZero works as expected", {
-  expect_message( { a <- simplifyFragmentData(d.missing.fragvol, id.var = 'phiid', nullFragsAreZero = FALSE) } )
-  expect_message( { b <- simplifyFragmentData(d.missing.fragvol, id.var = 'phiid', nullFragsAreZero = TRUE) } )
+  expect_silent( { a <- simplifyFragmentData(d.missing.fragvol, id.var = 'phiid', nullFragsAreZero = FALSE) } )
+  expect_silent( { b <- simplifyFragmentData(d.missing.fragvol, id.var = 'phiid', nullFragsAreZero = TRUE) } )
   expect_equal(as.logical(is.na(a)), 
                c(FALSE, TRUE, FALSE, TRUE, FALSE, TRUE, FALSE, FALSE, TRUE, 
                            FALSE, TRUE, TRUE, TRUE, FALSE, FALSE, TRUE, FALSE, FALSE))