diff --git a/unit/internal/multiaccel_matcher.cpp b/unit/internal/multiaccel_matcher.cpp
index 1e689430..34e5c5ed 100644
--- a/unit/internal/multiaccel_matcher.cpp
+++ b/unit/internal/multiaccel_matcher.cpp
@@ -287,3 +287,8 @@ static const MultiaccelTestParam multiaccelTests[] = {
 };
 
 INSTANTIATE_TEST_CASE_P(Multiaccel, MultiaccelTest, ValuesIn(multiaccelTests));
+
+// boring stuff for google test
+void PrintTo(const MultiaccelTestParam &p, ::std::ostream *os) {
+    *os << "MultiaccelTestParam: " << p.match_pattern;
+}
diff --git a/unit/internal/nfagraph_repeat.cpp b/unit/internal/nfagraph_repeat.cpp
index 53506b83..2473d755 100644
--- a/unit/internal/nfagraph_repeat.cpp
+++ b/unit/internal/nfagraph_repeat.cpp
@@ -103,3 +103,9 @@ TEST_P(NFAPureRepeatTest, Check) {
     ASSERT_EQ(t.minBound, repeat.bounds.min);
     ASSERT_EQ(t.maxBound, repeat.bounds.max);
 }
+
+// for google test
+void PrintTo(const PureRepeatTest &p, ::std::ostream *os) {
+    *os << "PureRepeatTest: " << p.pattern
+        << "{" << p.minBound << ',' << p.maxBound << '}';
+}
diff --git a/unit/internal/nfagraph_width.cpp b/unit/internal/nfagraph_width.cpp
index 81c49532..03508ea8 100644
--- a/unit/internal/nfagraph_width.cpp
+++ b/unit/internal/nfagraph_width.cpp
@@ -84,3 +84,14 @@ TEST_P(NFAWidthTest, Check) {
     ASSERT_EQ(t.minWidth, findMinWidth(*w));
     ASSERT_EQ(t.maxWidth, findMaxWidth(*w));
 }
+
+// for google test
+void PrintTo(const WidthTest &w, ::std::ostream *os) {
+    *os << "WidthTest: " << w.pattern << "{" << w.minWidth << ',';
+    if (w.maxWidth == depth::infinity()) {
+        *os << "inf";
+    } else {
+        *os << w.maxWidth;
+    }
+    *os << '}';
+}