diff --git a/src/scripts/merge_tools/gitmerge_ort.sh b/src/scripts/merge_tools/gitmerge_ort.sh
index d8a695734b..a72d9ee50c 100755
--- a/src/scripts/merge_tools/gitmerge_ort.sh
+++ b/src/scripts/merge_tools/gitmerge_ort.sh
@@ -7,4 +7,6 @@ clone_dir=$1
 branch1=$2
 branch2=$3
 strategy="-s ort"
-"$MERGE_SCRIPTS_DIR"/gitmerge.sh "$clone_dir" "$branch1" "$branch2" "$strategy"
+if ! "$MERGE_SCRIPTS_DIR"/gitmerge.sh "$clone_dir" "$branch1" "$branch2" "$strategy"; then
+  exit 1
+fi
diff --git a/src/scripts/merge_tools/gitmerge_ort_ignorespace.sh b/src/scripts/merge_tools/gitmerge_ort_ignorespace.sh
index ef1a5df5f8..a085edcaa6 100755
--- a/src/scripts/merge_tools/gitmerge_ort_ignorespace.sh
+++ b/src/scripts/merge_tools/gitmerge_ort_ignorespace.sh
@@ -7,4 +7,6 @@ clone_dir=$1
 branch1=$2
 branch2=$3
 strategy="-s ort -Xignore-space-change"
-"$MERGE_SCRIPTS_DIR"/gitmerge.sh "$clone_dir" "$branch1" "$branch2" "$strategy"
+if ! "$MERGE_SCRIPTS_DIR"/gitmerge.sh "$clone_dir" "$branch1" "$branch2" "$strategy"; then
+  exit 1
+fi
diff --git a/src/scripts/merge_tools/gitmerge_ort_imports.sh b/src/scripts/merge_tools/gitmerge_ort_imports.sh
index dcd8077ad7..cf0309d91f 100755
--- a/src/scripts/merge_tools/gitmerge_ort_imports.sh
+++ b/src/scripts/merge_tools/gitmerge_ort_imports.sh
@@ -7,6 +7,11 @@ clone_dir=$1
 branch1=$2
 branch2=$3
 strategy="-s ort"
-"$MERGE_SCRIPTS_DIR"/gitmerge.sh "$clone_dir" "$branch1" "$branch2" "$strategy"
+if "$MERGE_SCRIPTS_DIR"/gitmerge.sh "$clone_dir" "$branch1" "$branch2" "$strategy"; then
+  exit 0
+fi
 
-(cd "$clone_dir" && "$MERGE_SCRIPTS_DIR"/resolve-import-conflicts)
+cd "$clone_dir" || exit 1
+if ! "$MERGE_SCRIPTS_DIR"/resolve-import-conflicts; then
+  exit 1
+fi
diff --git a/src/scripts/merge_tools/gitmerge_ort_imports_ignorespace.sh b/src/scripts/merge_tools/gitmerge_ort_imports_ignorespace.sh
index 324fdea7e3..b6ae36b948 100755
--- a/src/scripts/merge_tools/gitmerge_ort_imports_ignorespace.sh
+++ b/src/scripts/merge_tools/gitmerge_ort_imports_ignorespace.sh
@@ -7,6 +7,11 @@ clone_dir=$1
 branch1=$2
 branch2=$3
 strategy="-s ort -Xignore-space-change"
-"$MERGE_SCRIPTS_DIR"/gitmerge.sh "$clone_dir" "$branch1" "$branch2" "$strategy"
+if "$MERGE_SCRIPTS_DIR"/gitmerge.sh "$clone_dir" "$branch1" "$branch2" "$strategy"; then
+  exit 0
+fi
 
-(cd "$clone_dir" && "$MERGE_SCRIPTS_DIR"/resolve-import-conflicts)
+cd "$clone_dir" || exit 1
+if ! "$MERGE_SCRIPTS_DIR"/resolve-import-conflicts; then
+  exit 1
+fi
diff --git a/src/scripts/merge_tools/gitmerge_recursive_histogram.sh b/src/scripts/merge_tools/gitmerge_recursive_histogram.sh
index 6453c6e00e..3d8238775a 100755
--- a/src/scripts/merge_tools/gitmerge_recursive_histogram.sh
+++ b/src/scripts/merge_tools/gitmerge_recursive_histogram.sh
@@ -7,4 +7,6 @@ clone_dir=$1
 branch1=$2
 branch2=$3
 strategy="-s recursive -Xdiff-algorithm=histogram"
-"$MERGE_SCRIPTS_DIR"/gitmerge.sh "$clone_dir" "$branch1" "$branch2" "$strategy"
+if ! "$MERGE_SCRIPTS_DIR"/gitmerge.sh "$clone_dir" "$branch1" "$branch2" "$strategy"; then
+  exit 1
+fi
diff --git a/src/scripts/merge_tools/gitmerge_recursive_ignorespace.sh b/src/scripts/merge_tools/gitmerge_recursive_ignorespace.sh
index 812d2dcd18..519db73d40 100755
--- a/src/scripts/merge_tools/gitmerge_recursive_ignorespace.sh
+++ b/src/scripts/merge_tools/gitmerge_recursive_ignorespace.sh
@@ -7,4 +7,6 @@ clone_dir=$1
 branch1=$2
 branch2=$3
 strategy="-s recursive -Xignore-space-change"
-"$MERGE_DIR"/gitmerge.sh "$clone_dir" "$branch1" "$branch2" "$strategy"
+if ! "$MERGE_DIR"/gitmerge.sh "$clone_dir" "$branch1" "$branch2" "$strategy"; then
+    exit 1
+fi
diff --git a/src/scripts/merge_tools/gitmerge_recursive_minimal.sh b/src/scripts/merge_tools/gitmerge_recursive_minimal.sh
index e7d916539a..e5a6edff9f 100755
--- a/src/scripts/merge_tools/gitmerge_recursive_minimal.sh
+++ b/src/scripts/merge_tools/gitmerge_recursive_minimal.sh
@@ -7,4 +7,6 @@ clone_dir=$1
 branch1=$2
 branch2=$3
 strategy="-s recursive -Xdiff-algorithm=minimal"
-"$MERGE_SCRIPTS_DIR"/gitmerge.sh "$clone_dir" "$branch1" "$branch2" "$strategy"
+if ! "$MERGE_SCRIPTS_DIR"/gitmerge.sh "$clone_dir" "$branch1" "$branch2" "$strategy"; then
+    exit 1
+fi
diff --git a/src/scripts/merge_tools/gitmerge_recursive_myers.sh b/src/scripts/merge_tools/gitmerge_recursive_myers.sh
index f95f093ba7..3fafe5e977 100755
--- a/src/scripts/merge_tools/gitmerge_recursive_myers.sh
+++ b/src/scripts/merge_tools/gitmerge_recursive_myers.sh
@@ -7,4 +7,6 @@ clone_dir=$1
 branch1=$2
 branch2=$3
 strategy="-s recursive -Xdiff-algorithm=myers"
-"$MERGE_SCRIPTS_DIR"/gitmerge.sh "$clone_dir" "$branch1" "$branch2" "$strategy"
+if ! "$MERGE_SCRIPTS_DIR"/gitmerge.sh "$clone_dir" "$branch1" "$branch2" "$strategy"; then
+  exit 1
+fi
diff --git a/src/scripts/merge_tools/gitmerge_recursive_patience.sh b/src/scripts/merge_tools/gitmerge_recursive_patience.sh
index 77e5a8e449..ef47dc2cab 100755
--- a/src/scripts/merge_tools/gitmerge_recursive_patience.sh
+++ b/src/scripts/merge_tools/gitmerge_recursive_patience.sh
@@ -7,4 +7,6 @@ clone_dir=$1
 branch1=$2
 branch2=$3
 strategy="-s recursive -Xdiff-algorithm=patience"
-"$MERGE_SCRIPTS_DIR"/gitmerge.sh "$clone_dir" "$branch1" "$branch2" "$strategy"
+if ! "$MERGE_SCRIPTS_DIR"/gitmerge.sh "$clone_dir" "$branch1" "$branch2" "$strategy"; then
+  exit 1
+fi
diff --git a/src/scripts/merge_tools/resolve-import-conflicts b/src/scripts/merge_tools/resolve-import-conflicts
index 4b311eddc3..fc4605f54a 100755
--- a/src/scripts/merge_tools/resolve-import-conflicts
+++ b/src/scripts/merge_tools/resolve-import-conflicts
@@ -9,6 +9,10 @@
 # parent 2 files, all without conflict markers.
 # However, this script can be run instead of a git mergetool, or after a git mergetool.
 
+# Exit status is 1 if conflicts remain after running this script or if
+# there is an error generated in some file.
+# Exit status is 0 if there are no conflicts after running this script.
+
 if [ "$#" -eq 0 ] ; then
   readarray -t files < <(grep -l -r '^<<<<<<< HEAD' .)
 else
@@ -17,12 +21,20 @@ fi
 
 SCRIPTDIR="$(cd "$(dirname "$0")" && pwd -P)"
 
-status=0
-
 for file in "${files[@]}" ; do
   if ! "${SCRIPTDIR}"/resolve-import-conflicts-in-file.py "$file" ; then
-    status=1
+    echo "Error in $file"
+    git merge --abort
+    exit 1
   fi
 done
 
-exit $status
+# From https://stackoverflow.com/questions/41246415/
+if git diff --exit-code -S '<<<<<<< HEAD' -S "=======" -S ">>>>>>> $(git name-rev --name-only MERGE_HEAD)" HEAD ; then
+  exit 0
+fi
+
+echo "Conflict"
+git merge --abort
+exit 1
+
diff --git a/src/scripts/merge_tools/resolve-import-conflicts-in-file.py b/src/scripts/merge_tools/resolve-import-conflicts-in-file.py
index 9c4f7878c0..2398ec4586 100755
--- a/src/scripts/merge_tools/resolve-import-conflicts-in-file.py
+++ b/src/scripts/merge_tools/resolve-import-conflicts-in-file.py
@@ -1,7 +1,11 @@
 #! /usr/bin/env python
 
 """Edits a file in place to remove conflict markers related to Java imports.
-It simplistically leaves all the imports that appear in either parent.
+The merged version contains all the imports that appear in either parent.
+This is simplistic, but is often adequate.
+
+Exit status is 1 only if the program halts exceptionally.
+With an exit status of 0, some conflicts may still exist in the file.
 """