diff --git a/test/shell/integrity-caching.sh b/test/shell/integrity-caching.sh
index 73d33de18..838bbded0 100644
--- a/test/shell/integrity-caching.sh
+++ b/test/shell/integrity-caching.sh
@@ -28,7 +28,7 @@ aux prepare_devs 6 80
 # Use awk instead of anoyingly long log out from printf
 #printf "%0.sA" {1..16384} >> fileA
 awk 'BEGIN { while (z++ < 16384) printf "A" }' > fileA
-awk 'BEGIN { while (z++ < 4096) printf "B" }' > fileB
+awk 'BEGIN { while (z++ < 4096) printf "B" ; while (z++ < 16384) printf "b" }' > fileB
 awk 'BEGIN { while (z++ < 16384) printf "C" }' > fileC
 
 # generate random data
diff --git a/test/shell/integrity-syncaction.sh b/test/shell/integrity-syncaction.sh
index ededda010..0f8ce17d2 100644
--- a/test/shell/integrity-syncaction.sh
+++ b/test/shell/integrity-syncaction.sh
@@ -27,7 +27,7 @@ aux prepare_devs 3 40
 # Use awk instead of anoyingly long log out from printf
 #printf "%0.sA" {1..16384} >> fileA
 awk 'BEGIN { while (z++ < 16384) printf "A" }' > fileA
-awk 'BEGIN { while (z++ < 4096) printf "B" }' > fileB
+awk 'BEGIN { while (z++ < 4096) printf "B" ; while (z++ < 16384) printf "b" }' > fileB
 awk 'BEGIN { while (z++ < 16384) printf "C" }' > fileC
 
 _prepare_vg() {
diff --git a/test/shell/integrity.sh b/test/shell/integrity.sh
index b55855ab4..1ba75d230 100644
--- a/test/shell/integrity.sh
+++ b/test/shell/integrity.sh
@@ -28,7 +28,7 @@ aux prepare_devs 5 64
 # Use awk instead of anoyingly long log out from printf
 #printf "%0.sA" {1..16384} >> fileA
 awk 'BEGIN { while (z++ < 16384) printf "A" }' > fileA
-awk 'BEGIN { while (z++ < 4096) printf "B" }' > fileB
+awk 'BEGIN { while (z++ < 4096) printf "B" ; while (z++ < 16384) printf "b" }' > fileB
 awk 'BEGIN { while (z++ < 16384) printf "C" }' > fileC
 
 # generate random data