diff --git a/t/lib/bash/collect_mysql_info.sh b/t/lib/bash/collect_mysql_info.sh
index 390d051c..7a8c8a26 100644
--- a/t/lib/bash/collect_mysql_info.sh
+++ b/t/lib/bash/collect_mysql_info.sh
@@ -18,6 +18,19 @@ samples="$PERCONA_TOOLKIT_BRANCH/t/pt-mysql-summary/samples"
 
 mkdir "$p"
 
+# This is mostly for the find_my_cnf_file tests.
+# Test machines may have one of these, and find_my_cnf_file will use
+# the same if the specific port-based cnf file isn't found.
+if [ -e "/etc/my.cnf" ]; then
+   sys_cnf_file="/etc/my.cnf"
+elif [ -e "/etc/mysql/my.cnf" ]; then
+   sys_cnf_file="/etc/mysql/my.cnf"
+elif [ -e "/var/db/mysql/my.cnf" ]; then
+   sys_cnf_file="/var/db/mysql/my.cnf";
+else
+   sys_cnf_file=""
+fi
+
 parse_options "$BIN_DIR/pt-mysql-summary" --sleep 1 -- --defaults-file=/tmp/12345/my.sandbox.cnf
 
 CMD_MYSQL="$(_which mysql)"
@@ -28,7 +41,13 @@ wait
 
 file_count=$(ls "$p" | wc -l)
 
-is $file_count 13 "Creates the correct number of files (without --databases)"
+if [ "$sys_cnf_file" ]; then
+   n_files=14
+else
+   n_files=13
+fi
+
+is $file_count $n_files "Creates the correct number of files (without --databases)"
 
 awk '{print $1}' "$p/mysqld-instances" > "$PT_TMPDIR/collect_mysqld_instances1.test"
 pids="$(_pidof mysqld)"
@@ -80,18 +99,6 @@ is \
 
 # find_my_cnf_file
 
-# Test machines may have one of these, and find_my_cnf_file will use
-# the same if the specific port-based cnf file isn't found.
-if [ -e "/etc/my.cnf" ]; then
-   sys_cnf_file="/etc/my.cnf"
-elif [ -e "/etc/mysql/my.cnf" ]; then
-   sys_cnf_file="/etc/mysql/my.cnf"
-elif [ -e "/var/db/mysql/my.cnf" ]; then
-   sys_cnf_file="/var/db/mysql/my.cnf";
-else
-   sys_cnf_file=""
-fi
-
 # We know the port is 12345 (2nd to last test), but the sandbox is started
 # with just --defaults-file, no --port, so find_my_cnf_file isn't going to
 # be able to get the specific cnf file.
diff --git a/t/pt-mysql-summary/pt-mysql-summary.t b/t/pt-mysql-summary/pt-mysql-summary.t
index 7d7da788..8898d2d9 100644
--- a/t/pt-mysql-summary/pt-mysql-summary.t
+++ b/t/pt-mysql-summary/pt-mysql-summary.t
@@ -32,13 +32,14 @@ ok(
    "Using --save-samples doesn't mistakenly delete the target dir"
 );
 
+# If the box has a default my.cnf (e.g. /etc/my.cnf) there
+# should be 15 files, else 14.
 my @files = glob("$dir/*");
-
-is(
-   scalar @files,
-   14,
+my $n_files = scalar @files;
+ok(
+   $n_files == 15 || $n_files == 14,
    "And leaves all files in there"
-);
+) or diag($n_files, `ls -l $dir`);
 
 undef($dir);