diff --git a/tests/test_version-lookup.bats b/tests/test_version-lookup.bats
index b0864e8..86cc114 100644
--- a/tests/test_version-lookup.bats
+++ b/tests/test_version-lookup.bats
@@ -5,6 +5,15 @@ load helper_print-info
 
 export repo=".tmp_testing/repo"
 
+setup() {
+    # get the containing directory of this file
+    # use $BATS_TEST_FILENAME instead of ${BASH_SOURCE[0]} or $0,
+    # as those will point to the bats executable's location or the preprocessed file respectively
+    DIR="$( cd "$( dirname "$BATS_TEST_FILENAME" )" >/dev/null 2>&1 && pwd )"
+    # make executables in src/ visible to PATH
+    PATH="$DIR/../:$PATH"
+}
+
 function init_repo {
     rm -rf "${repo}" &&
     mkdir -p "${repo}" &&
@@ -22,7 +31,7 @@ function init_repo {
 
     export scheme="foover"
 
-    run ../../version-lookup.sh
+    run version-lookup.sh
 
     print_run_info
     [ "$status" -eq 8 ] &&
@@ -30,7 +39,7 @@ function init_repo {
 }
 
 @test "no deprecated set-output calls made" {
-    run grep -q "::set-output" version-lookup.sh
+    run grep -q "::set-output" ../version-lookup.sh
 
     print_run_info
     [ "$status" -eq 1 ]
@@ -43,7 +52,7 @@ function init_repo {
     git tag 0.1.1
     git tag 0.1.2
 
-    run ../../version-lookup.sh
+    run version-lookup.sh
 
     print_run_info
     [ "$status" -eq 0 ] &&
@@ -55,7 +64,7 @@ function init_repo {
 
     git tag 0.1.2
 
-    run ../../version-lookup.sh
+    run version-lookup.sh
 
     print_run_info
     [ "$status" -eq 0 ] &&
@@ -69,7 +78,7 @@ function init_repo {
     git tag 1.2.300
     git tag 1.2.301-dev.234
 
-    run ../../version-lookup.sh
+    run version-lookup.sh
 
     print_run_info
     [ "$status" -eq 0 ] &&
@@ -79,7 +88,7 @@ function init_repo {
 @test "returns 0.0.0 if no normal version detected" {
     init_repo
 
-    run ../../version-lookup.sh
+    run version-lookup.sh
 
     print_run_info
     [ "$status" -eq 0 ] &&
@@ -91,7 +100,7 @@ function init_repo {
 
     git tag 0.0.1-dev.999
 
-    run ../../version-lookup.sh
+    run version-lookup.sh
 
     print_run_info
     [ "$status" -eq 0 ] &&
@@ -103,7 +112,7 @@ function init_repo {
 
     export scheme="calver"
 
-    run ../../version-lookup.sh
+    run version-lookup.sh
 
     print_run_info
     [ "$status" -eq 0 ] &&
@@ -115,7 +124,7 @@ function init_repo {
 
     git tag v3.4.5
 
-    run ../../version-lookup.sh
+    run version-lookup.sh
 
     print_run_info
     [ "$status" -eq 0 ] &&
diff --git a/version-lookup.sh b/version-lookup.sh
index 6a4d170..1780cc9 100755
--- a/version-lookup.sh
+++ b/version-lookup.sh
@@ -50,7 +50,7 @@ if [[ -z "${current_version:-}" ]] ; then
             current_version="0.0.0"
         ;;
         calver)
-            current_version="$(date '+%Y.%-m.1')"
+            current_version="$(date '+%Y.%-m.0')"
         ;;
     esac
 fi