diff --git a/libexec/bats-exec-test b/libexec/bats-exec-test
index 5a07665..8f3bd51 100755
--- a/libexec/bats-exec-test
+++ b/libexec/bats-exec-test
@@ -48,7 +48,7 @@ load() {
 }
 
 run() {
-  local e E T
+  local e E T oldIFS
   [[ ! "$-" =~ e ]] || e=1
   [[ ! "$-" =~ E ]] || E=1
   [[ ! "$-" =~ T ]] || T=1
@@ -57,10 +57,12 @@ run() {
   set +T
   output="$("$@" 2>&1)"
   status="$?"
+  oldIFS=$IFS
   IFS=$'\n' lines=($output)
   [ -z "$e" ] || set -e
   [ -z "$E" ] || set -E
   [ -z "$T" ] || set -T
+  IFS=$oldIFS
 }
 
 setup() {
diff --git a/test/bats.bats b/test/bats.bats
index 280515d..f1aff29 100755
--- a/test/bats.bats
+++ b/test/bats.bats
@@ -30,14 +30,14 @@ fixtures bats
 @test "empty test file runs zero tests" {
   run bats "$FIXTURE_ROOT/empty.bats"
   [ $status -eq 0 ]
-  [ $output = "1..0" ]
+  [ "$output" = "1..0" ]
 }
 
 @test "one passing test" {
   run bats "$FIXTURE_ROOT/passing.bats"
   [ $status -eq 0 ]
-  [ ${lines[0]} = "1..1" ]
-  [ ${lines[1]} = "ok 1 a passing test" ]
+  [ "${lines[0]}" = "1..1" ]
+  [ "${lines[1]}" = "ok 1 a passing test" ]
 }
 
 @test "summary passing tests" {
@@ -256,3 +256,9 @@ fixtures bats
   [ "${lines[5]}" =  "# (in test file $RELATIVE_FIXTURE_ROOT/single_line.bats, line 9)" ]
   [ "${lines[6]}" = $'#   `@test "failing" { false; }\' failed' ]
 }
+
+@test "testing IFS not modified by run" {
+  run bats "$FIXTURE_ROOT/loop_keep_IFS.bats"
+  [ $status -eq 0 ]
+  [ "${lines[1]}" = "ok 1 loop_func" ]
+}
diff --git a/test/fixtures/bats/loop_keep_IFS.bats b/test/fixtures/bats/loop_keep_IFS.bats
new file mode 100644
index 0000000..f30613a
--- /dev/null
+++ b/test/fixtures/bats/loop_keep_IFS.bats
@@ -0,0 +1,16 @@
+# see issue #89
+loop_func() {
+  local search="none one two tree"
+  local d
+
+  for d in $search ; do
+    echo $d
+  done
+}
+
+@test "loop_func" {
+  run loop_func
+  [[ "${lines[3]}" == 'tree' ]]
+  run loop_func
+  [[ "${lines[2]}" == 'two' ]]
+}
diff --git a/test/suite.bats b/test/suite.bats
index 14f5008..5371686 100755
--- a/test/suite.bats
+++ b/test/suite.bats
@@ -6,30 +6,30 @@ fixtures suite
 @test "running a suite with no test files" {
   run bats "$FIXTURE_ROOT/empty"
   [ $status -eq 0 ]
-  [ $output = "1..0" ]
+  [ "$output" = "1..0" ]
 }
 
 @test "running a suite with one test file" {
   run bats "$FIXTURE_ROOT/single"
   [ $status -eq 0 ]
-  [ ${lines[0]} = "1..1" ]
-  [ ${lines[1]} = "ok 1 a passing test" ]
+  [ "${lines[0]}" = "1..1" ]
+  [ "${lines[1]}" = "ok 1 a passing test" ]
 }
 
 @test "counting tests in a suite" {
   run bats -c "$FIXTURE_ROOT/single"
   [ $status -eq 0 ]
-  [ $output -eq 1 ]
+  [ "$output" -eq 1 ]
 
   run bats -c "$FIXTURE_ROOT/multiple"
   [ $status -eq 0 ]
-  [ $output -eq 3 ]
+  [ "$output" -eq 3 ]
 }
 
 @test "aggregated output of multiple tests in a suite" {
   run bats "$FIXTURE_ROOT/multiple"
   [ $status -eq 0 ]
-  [ ${lines[0]} = "1..3" ]
+  [ "${lines[0]}" = "1..3" ]
   echo "$output" | grep "^ok . truth"
   echo "$output" | grep "^ok . more truth"
   echo "$output" | grep "^ok . quasi-truth"
@@ -38,14 +38,14 @@ fixtures suite
 @test "a failing test in a suite results in an error exit code" {
   FLUNK=1 run bats "$FIXTURE_ROOT/multiple"
   [ $status -eq 1 ]
-  [ ${lines[0]} = "1..3" ]
+  [ "${lines[0]}" = "1..3" ]
   echo "$output" | grep "^not ok . quasi-truth"
 }
 
 @test "running an ad-hoc suite by specifying multiple test files" {
   run bats "$FIXTURE_ROOT/multiple/a.bats" "$FIXTURE_ROOT/multiple/b.bats"
   [ $status -eq 0 ]
-  [ ${lines[0]} = "1..3" ]
+  [ "${lines[0]}" = "1..3" ]
   echo "$output" | grep "^ok . truth"
   echo "$output" | grep "^ok . more truth"
   echo "$output" | grep "^ok . quasi-truth"