Pandas - Comparing two dataframes not yielding complete output

I am trying to compare two dataframes using merge function but I see there are issues with this.

For example, given below is how df1 is:

id,date,ref_col
101,1/7/2018,1011/7/2018
101,2/7/2018,1012/7/2018
101,3/7/2018,1013/7/2018

df2 has the below dataset:

id,date,ref_col
101,1/7/2018,1011/7/2018
101,3/7/2018,1013/7/2018

I am trying to merge using the below:

new_df = df1.merge(df2, left_on=['ref_col'], right_on=['ref_col'])

The above returns only one row but not both the rows. However if I manually check in a spreadsheet both the rows are exactly the same.

Expected output:

101,1/7/2018,1011/7/2018
101,3/7/2018,1013/7/2018

but it returns only

101,1/7/2018,1011/7/2018